The Practical Gemologist

I can’t think of a better way to usher in September than with a gorgeous and quintessential blue sapphire in a stunning Art Deco style setting from one of my favorite designers, Oscar Heyman. ...

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The head of the sleeping Medusa carved in peridot. The Roman made intaglio dates to ca. 1st century B.C.–3rd century A.D. From the MET collection . . . ___________________ #peridot #augus...

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Beautiful greens by Victor Velyan. A large peridot surrounded by gold and silver with an unusual green patina and diamond accents. Available from Skibell Fine Jewelry.

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Boucheron jewelry really is the stuff that dreams are made of. Mounted with a 78.33 carat Santa Maria aquamarine and around 2000 cultured pearls, the Baïkal necklace is an ode to imperial jewel...

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•The name ruby comes from the Latin word ruber, which means “red”. •Ruby is the birthstone for July and the gem for the 15th (in the U.S.) and 40th anniversaries. •Ruby is the most v...

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Renaissance Revival style brooch-pendant made by the firm of Castellani in Rome circa. 1860-1900. The brooch-pendant is gold, with enamel, rubies, sapphires, and pearls. Castellani was famous for...

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Gorgeous American made late-19th century 14 karat gold pendant featuring an ethereal moonstone and ruby accents. Available from Macklowe Gallery ltd.

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Retro era 1940s Acanthus Leaf Clip Brooches featuring rubies and diamonds set in gold by American jewelry firm Raymond Yard inc. Available from Jacob’s Diamond & Estate Jewelry.

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Welcoming July with something spectacular. An absolutely stunning ring by Buccellati. Featuring a Burmese ruby surrounded by a lattice of diamonds. Available from Steven Fox Jewelry.

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Sumptuous gold surrounding cultured pearls and purple sapphires. Earrings by Paula Crevoshay.

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Non nacreous pearl from the “spiny oyster”: 6.97 ct bicolored white and pink Spondylus pearl with a beautiful reflective blue coloration a flame structure when viewed in certain directions u...

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Total jewelry crush on this two toned gold 1940s retro Tiffany & Co. brooch. Available from Nadine Krakov Collection.

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We all could use more rainbows in our lives 🌈 The Black Rainbow Tiara by Solange Azagury-Partridge. An open work tiara set with an oval black Opal surrounded by tiers of Diamonds and precious...

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Shelled mollusks produce a “pearl” when a microscopic irritant is trapped within its mantle folds. The mollusk creates a pearl sac to seal off the irritation. This is a part of the mollusk’...

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•Alexandrite is a variety of chrysoberyl know for its dramatic color change from purplish-red under incandescent light to bluish-green in daylight or fluorescent light. •Impurities of chromi...

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•Feldspars are the most diverse and widespread minerals in the earth’s crust. •Moonstone is the most familiar gem-quality member of the feldspar group. •Moonstone is a part of the fel...

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•The hard clams (Mercenaria mercenaria) or Quahogs are an edible marine bivalve mollusk, also known as a round clam, or hard-shell (or hard-shelled) clam. • The clams are native to the Atla...

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•Melo “pearls” are non nacreous calcareous concretion. •They come from the Indian volute (melo melo snail). A very large sea snail (marine gastropod mollusc) native to Southeast Asia, fr...

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•Conch “pearls” are calcareous concretions produced by the Queen conch mollusk, Strombus gigas, which is found in various areas of the Caribbean. •All Conch pearls are natural; attempts...

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According to Hindu mythology, moonstone is made of solidified moonbeams. Many legends say that moonstone brings good luck and some even believe that the stone allows you to that see the future ...

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