<?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"><channel><title><![CDATA[laboratoire gem quebec]]></title><description><![CDATA[Gemology laboratory in Laval, Quebec. Expert evaluation and sale of certified sapphires, rubies, opals and spinels. Scientific quality and guaranteed authenticity.]]></description><link>https://www.labgemquebec.com/blog</link><generator>RSS for Node</generator><lastBuildDate>Sun, 05 Apr 2026 03:15:46 GMT</lastBuildDate><atom:link href="https://www.labgemquebec.com/blog-feed.xml" rel="self" type="application/rss+xml"/><item><title><![CDATA[Why Rubies, Sapphires, and Emeralds are the Ultimate Investment for 2026.]]></title><description><![CDATA[Le monde change, et la façon dont on protège son argent aussi. Quand l'économie devient floue, on arrête de courir après les tendances éphémères pour revenir à ce qui est palpable. L'or a toujours été la valeur refuge par excellence, mais aujourd'hui, le vrai mouvement de fond se passe du côté des gemmes d'investissement.]]></description><link>https://www.labgemquebec.com/en/post/why-rubies-sapphires-and-emeralds-are-the-ultimate-investment-for-2026</link><guid isPermaLink="false">69cebab22bb8d025123d0cd0</guid><pubDate>Thu, 02 Apr 2026 18:53:32 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_348286e8770d498faa60cdb62590c2b6~mv2.png/v1/fit/w_740,h_520,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[Pourquoi investir dans le rubis, le saphir et l’émeraude en 2026 ?]]></title><description><![CDATA[Le monde change, et la façon dont on protège son argent aussi. Quand l'économie devient floue, on arrête de courir après les tendances éphémères pour revenir à ce qui est palpable. L'or a toujours été la valeur refuge par excellence, mais aujourd'hui, le vrai mouvement de fond se passe du côté des gemmes d'investissement.]]></description><link>https://www.labgemquebec.com/post/pourquoi-investir-dans-le-rubis-le-saphir-et-l-%C3%A9meraude-en-2026</link><guid isPermaLink="false">69cea3bbf7044e6cf7a8fa25</guid><pubDate>Thu, 02 Apr 2026 17:22:16 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_348286e8770d498faa60cdb62590c2b6~mv2.png/v1/fit/w_740,h_520,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[Analyser la pureté d'une émeraude en détail : un guide expert]]></title><description><![CDATA[Analyser la pureté d'une émeraude en détail : un guide expert, Comprendre la pureté émeraude Laboratoire Gem Quebec]]></description><link>https://www.labgemquebec.com/post/analyser-la-puret%C3%A9-d-une-%C3%A9meraude-en-d%C3%A9tail-un-guide-expert</link><guid isPermaLink="false">69b38a9ad558374c818e7e07</guid><pubDate>Fri, 13 Mar 2026 03:58:12 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_5a047871f86e48d0b9322ee91fb0458a~mv2.png/v1/fit/w_1000,h_768,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[Les 15 Gemmes les Plus Rares : Une Exploration au-delà de l'Exceptionnel]]></title><description><![CDATA[Les 15 Gemmes les Plus Rares au monde détaillé avec un compte rendu]]></description><link>https://www.labgemquebec.com/post/les-15-gemmes-les-plus-rares-une-exploration-au-del%C3%A0-de-l-exceptionnel</link><guid isPermaLink="false">69b239a5a0b6c504fd076f4d</guid><pubDate>Thu, 12 Mar 2026 03:57:25 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_a3ebb8cd23614a0689c0b5395b714c8e~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[The 15 Rarest Gemstones]]></title><description><![CDATA[An Exploration Beyond the Exceptional In the world of high-precision gemmology, rarity is not measured by beauty alone, but by the improbable convergence of extreme geological conditions. Here are the 15 minerals that redefine the concept of exclusivity. 1. Painite Discovered in Myanmar in the 1950s, painite was long considered the rarest mineral on Earth. This calcium zirconium borate ( CaZrAl₉O₁₅(BO₃) ) exhibits orange-red to brownish hues. For decades, only two crystals were known to exist...]]></description><link>https://www.labgemquebec.com/en/post/the-15-rarest-gemstones</link><guid isPermaLink="false">69b239129f757da15ac4ee0d</guid><pubDate>Thu, 12 Mar 2026 03:54:58 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_8b28414e0b8d409caaf447a98edd3d5e~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[Zircon]]></title><description><![CDATA[Zircon: A Timeless Capsule of Adamantine Brilliance Often mistakenly confused with synthetic cubic zirconia, zircon is an exceptional natural gemstone with a history that reaches back to the very origins of our planet. Composed of zirconium silicate ( ZrSiO₄ ), it is one of the most fascinating minerals in modern gemmology due to its unique optical properties and unparalleled temporal density. High-Precision Optics: Fire and Birefringence Zircon stands out with physical properties that place...]]></description><link>https://www.labgemquebec.com/en/post/zircon</link><guid isPermaLink="false">69b23840ecfce39c49a89191</guid><pubDate>Thu, 12 Mar 2026 03:51:28 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_0c9fb5f38da84d6c9236db13008595fd~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[Tourmaline]]></title><description><![CDATA[Tourmaline: A Borosilicate Architecture of a Thousand Colors Tourmaline is not a single stone but a complex family of borosilicates. It is one of the most fascinating mineral groups in modern gemmology, offering a chromatic palette that spans nearly the entire visible spectrum. Its general chemical formula, XY₃Z₆(T₆O₁₈)(BO₃)₃V₃W , illustrates the structural complexity where numerous elements can substitute for one another. With a Mohs hardness of 7 to 7.5 , it combines spectacular aesthetics...]]></description><link>https://www.labgemquebec.com/en/post/tourmaline</link><guid isPermaLink="false">69b237e29f757da15ac4eb32</guid><pubDate>Thu, 12 Mar 2026 03:49:54 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_7a4b15d5db4e48b2b31ccbd9589a34cc~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[Opal]]></title><description><![CDATA[Opal: An Architecture of Light and Water  Opal is one of the most fascinating gemstones in mineralogy. Unlike most stones, it is not crystalline but amorphous. It is a hydrated silica with the formula SiO₂·nH₂O , typically containing between 3% and 21% water. This unique nature makes it a "living gem," sensitive to its environment. The Play-of-Color Phenomenon  What defines precious opal is its "play-of-color." This is not a surface pigment but a diffraction  phenomenon. Nanostructure:  Under...]]></description><link>https://www.labgemquebec.com/en/post/_opal</link><guid isPermaLink="false">69b23791ecfce39c49a88feb</guid><pubDate>Thu, 12 Mar 2026 03:48:33 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_a73c1f8398f844bca482736fbed07be0~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[Garnet]]></title><description><![CDATA[Garnets: A Diverse Family of Silicates  In gemmology, "Garnet" does not refer to a single species but to a group of neosilicate minerals sharing an identical cubic crystal structure. Their general formula is X₃Y₂(SiO₄)₃ , where X  and Y  are sites occupied by various metals (Magnesium, Calcium, Iron, Aluminum, Manganese, Chromium). This atomic flexibility explains why garnet can appear in nearly every color except pure blue. The Two Main Garnet Series  Gemmologists traditionally divide the...]]></description><link>https://www.labgemquebec.com/en/post/garnet</link><guid isPermaLink="false">69b23731a0b6c504fd076981</guid><pubDate>Thu, 12 Mar 2026 03:46:57 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_d9d29cfde08c4bd28133297caea10cab~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[Topaz]]></title><description><![CDATA[Topaz: Vitreous Luster and Fluorine Geometry  Topaz is an aluminum nesosilicate containing fluorine and hydroxyl groups, with the chemical formula Al₂SiO₄(F,OH)₂ . It crystallizes in the orthorhombic system, often forming elongated prisms with complex terminations. With a Mohs hardness of 8 , it is highly resistant to abrasion, yet its atomic structure imparts a specific fragility. Formation and Structural Fragility  Topaz primarily forms in pegmatites  and hydrothermal veins associated with...]]></description><link>https://www.labgemquebec.com/en/post/topaz</link><guid isPermaLink="false">69b236e9ecfce39c49a88e59</guid><pubDate>Thu, 12 Mar 2026 03:45:45 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_85c2155dedc14624bfb2c37139936894~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[Diamond]]></title><description><![CDATA[Diamond: The Quintessence of Carbon and Pressure  Diamond is the only gemstone composed of a single element: carbon ( C ). Its cubic crystal structure, where each atom is bonded to four others by extremely strong covalent bonds, gives it a Mohs hardness of 10 , placing it at the very top of the mineral hierarchy. Geological Formation and Magmatic Ascent  Diamonds are not formed in the Earth's crust but in the upper mantle, at depths exceeding 150 km, under pressures of more than 50 kilobars....]]></description><link>https://www.labgemquebec.com/en/post/diamond</link><guid isPermaLink="false">69b23682ecfce39c49a88d68</guid><pubDate>Thu, 12 Mar 2026 03:44:02 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_4bcd928e617a4ddf9601e413f0c2b18e~mv2.png/v1/fit/w_944,h_911,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[Tanzanite]]></title><description><![CDATA[Tanzanite: A Unique Geological Treasure  Tanzanite is the blue-violet gemstone variety of the mineral species Zoisite, a calcium aluminum silicate with the formula Ca₂Al₃(SiO₄)₃(OH) . Its rarity is absolute: it is found in only one deposit on Earth, a small area of a few square kilometers in the Merelani Hills of Tanzania. Its fascinating color stems from trace amounts of vanadium ( V³⁺ ) within its orthorhombic structure. The Phenomenon of Trichroism  Tanzanite possesses one of the most...]]></description><link>https://www.labgemquebec.com/en/post/tanzanite</link><guid isPermaLink="false">69b2363aa0b6c504fd076737</guid><pubDate>Thu, 12 Mar 2026 03:42:50 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_696b3b61ca744d4f8d41450e36b224d1~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[Sapphire]]></title><description><![CDATA[Sapphire: An Infinite Spectrum Within Corundum  Sapphire belongs to the mineral species Corundum, an aluminum oxide with the chemical formula Al₂O₃ . With an exceptional Mohs hardness of 9 , it is the most durable gemstone after diamond. While blue is its iconic color, sapphire is actually a "fancy" gemstone: with the exception of red (reserved for ruby), it exists in every shade of the visible spectrum. Color Chemistry and Trace Elements  The coloration of sapphire is a charge-transfer...]]></description><link>https://www.labgemquebec.com/en/post/sapphire</link><guid isPermaLink="false">69b235e5a0b6c504fd076669</guid><pubDate>Thu, 12 Mar 2026 03:41:25 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_6550670e32d64305bffeae68f94454d4~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[Ruby]]></title><description><![CDATA[Ruby: The Chromatic Quintessence of Corundum  Ruby is the prestigious red variety of the mineral species Corundum, an aluminum oxide with the chemical formula Al₂O₃ . It shares the same crystal structure as sapphire but is distinguished by a specific trace element chemistry. With an exceptional Mohs hardness of 9 , ruby is the hardest gemstone after diamond, offering unparalleled resistance to scratches and daily wear. The Chemistry of Red: Chromium and Fluorescence  The color of ruby is due...]]></description><link>https://www.labgemquebec.com/en/post/_ruby</link><guid isPermaLink="false">69b235a4a0b6c504fd0765df</guid><pubDate>Thu, 12 Mar 2026 03:40:20 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_020a92ccdb2c4b97b46ba05c0e175861~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[Spinel]]></title><description><![CDATA[Spinel: The Renaissance of a Historical Gemstone  Long overshadowed by ruby and sapphire, spinel is now recognized as an exceptional gemstone by collectors and experts alike. Scientifically, it is a magnesium aluminum oxide with the formula MgAl₂O₄ . It belongs to the cubic crystal system, frequently appearing as perfect octahedrons with smooth faces. With a Mohs hardness of 8 , it offers remarkable resistance and durability, making it ideal for all jewelry designs. A Chemistry of Intense...]]></description><link>https://www.labgemquebec.com/en/post/spinel</link><guid isPermaLink="false">69b234eeecfce39c49a889bb</guid><pubDate>Thu, 12 Mar 2026 03:37:18 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_cc850c178f3749bd93761eebbbbb95fe~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[Quartz]]></title><description><![CDATA[Quartz: The Crystalline Pillar of the Earth's Crust  Quartz is the most iconic mineral of the lithosphere, composed of silicon dioxide ( SiO₂ ). It belongs to the trigonal crystal system and often appears as hexagonal prisms terminated by pyramids. With a Mohs hardness of 7 , it sets the durability standard for many gemstones; having no cleavage, it possesses exceptional robustness against mechanical impact. Chromatic Diversity from Trace Chemistry  Absolute purity in quartz results in Rock...]]></description><link>https://www.labgemquebec.com/en/post/quartz</link><guid isPermaLink="false">69b2348f19a7028f2bc04c22</guid><pubDate>Thu, 12 Mar 2026 03:35:43 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_3d2164fe158d402ba2e128eb59fab49c~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[Pearl]]></title><description><![CDATA[The Pearl: A Miracle of Biomineralization  Unlike mineral gemstones formed deep within the Earth, pearls are of organic origin. They result from a sophisticated defense mechanism of certain bivalve mollusks. The primary constituent of a pearl is nacre, a complex assembly composed of 90% calcium carbonate in the form of aragonite crystals ( CaCO₃ ), bound by an organic protein matrix called conchiolin. The Optics of Nacre: Luster and Orient  The beauty of a pearl does not lie in a surface...]]></description><link>https://www.labgemquebec.com/en/post/pearl</link><guid isPermaLink="false">69b2345c19a7028f2bc04bad</guid><pubDate>Thu, 12 Mar 2026 03:34:52 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_500056047ae64c4592501fccaa3a7ca6~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[Peridot]]></title><description><![CDATA[Peridot: A Messenger from the Earth's Mantle and Outer Space  Peridot is the gemstone variety of olivine, a solid solution between forsterite ( Mg₂SiO₄ ) and fayalite ( Fe₂SiO₄ ). It is an idiochromatic gemstone, meaning its signature green color is derived directly from its structural chemical composition—specifically the presence of iron ( Fe²⁺ ) —rather than external impurities. Deep Geology and Extraterrestrial Origins  Peridot is one of the few gemstones that does not form in the Earth's...]]></description><link>https://www.labgemquebec.com/en/post/peridot</link><guid isPermaLink="false">69b233b019a7028f2bc04a2f</guid><pubDate>Thu, 12 Mar 2026 03:32:00 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_9a826b0b96f64340a70f1d345082e8de~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[Malachite]]></title><description><![CDATA[Malachite: A Geological Record of Copper  Malachite is a basic copper carbonate mineral with the chemical formula Cu₂CO₃(OH)₂ . It is one of the most iconic minerals found in the oxidation zones of copper ore deposits. Its vibrant emerald-to-forest green color, which remains constant even in powdered form, stems from the high concentration of copper ions ( Cu²⁺ ) within its monoclinic crystal structure. Genesis and Banded Growth  Malachite forms through a secondary alteration process. When...]]></description><link>https://www.labgemquebec.com/en/post/malachite</link><guid isPermaLink="false">69b23361a0b6c504fd0760ea</guid><pubDate>Thu, 12 Mar 2026 03:30:41 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_f52a6d0d92494e6daddf989a87e12813~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item><item><title><![CDATA[Moonstone]]></title><description><![CDATA[Moonstone: The Mystery of Adularescence and Microstructure  Moonstone belongs to the vast feldspar family, specifically the alkali feldspar group. It is primarily composed of an intimate alternating structure of two species: orthoclase ( KAlSi₃O₈ ) and albite ( NaAlSi₃O₈ ). What makes it unique is not its intrinsic color, but the optical phenomenon known as adularescence . Physics of Light: Adularescence  The bluish or milky glow that seems to float on the gemstone's surface is the result of...]]></description><link>https://www.labgemquebec.com/en/post/moonstone</link><guid isPermaLink="false">69b23315ecfce39c49a885b9</guid><pubDate>Thu, 12 Mar 2026 03:29:25 GMT</pubDate><enclosure url="https://static.wixstatic.com/media/631eb0_6c61f53ed1a54543bd4a12641b78f1d3~mv2.png/v1/fit/w_1000,h_1000,al_c,q_80/file.png" length="0" type="image/png"/><dc:creator>Pierre Lafrance</dc:creator></item></channel></rss>