Tourmalines of Another Color
by Jourdan Block
April 23, 2021
Most known liddicoatite comes from the Anjanabonoina pegmatites in central Madagascar.
Diamonds Under the Scope
by Jourdan Block
April 8, 2021
Inclusions spin a tale of provenance and tell of the diamond's journey from deep within the earth to the surface.
Blue Diamonds from the Ocean Blue
by Jourdan Block
April 8, 2021
Research published by GIA scientist Evan Smith in the journal Nature reveals that blue diamonds likely formed deep in Earth's transition zone.
Trent Alert: Self-Love Pinky Ring
by Jourdan Block
April 7, 2021
The pinky ring is here for every woman to realize the power of loving themselves first, before giving the same kind of love to another person.
Collectors Only
by Jourdan Block
April 7, 2021
Rhodonite was first discovered in 1790 in the Ural Mountains near Sidelnikovo.
Unusual Violet Maxixe Beryl
by Jourdan Block
April 7, 2021
Recently examined in the Carlsbad laboratory was a 26.72 ct transparent violet modified cushion mixed-cut stone (pictured). Standard gemological t...
A Look at Kimberlites: The Volcanoes that Carry Diamonds
by Jourdan Block
April 7, 2021
Think of kimberlites as elevators that diamonds use to ride up to Earth’s surface!
Optical Effects of Phenomenal Cabochons
by Jourdan Block
March 17, 2021
Opal, labradorite and moonstone form in microscopic layers of material that are successively stacked upon each other, giving rise to phenomena based on these unique structures.
A Gem That's Out of This World!
by Jourdan Block
March 10, 2021
Pallasite is a type of meteorite that contains crystalline olivine in a nickel-iron matrix.
Royal Gems
by Jourdan Block
March 10, 2021
Royal collections peaked in the 18th century with diamonds flowing in from Brazil, emeralds from Colombia, and sapphires, rubies and pearls from Asia.
An Aquamarine Assortment
by Jourdan Block
March 4, 2021
Nigeria produces a wealth of gemstones, including tourmaline, sapphire and beryl (aquamarine, morganite, heliodor, green beryl and emerald), among others. In 2019, a deposit of medium to deep blue aquamarine was discovered in the Nasarawa State in Nigeria.
Glowing Praise for Paraíba Tourmaline
by Jourdan Block
February 24, 2021
Paraíba tourmaline is known for its neon color caused by trace amounts of copper and manganese.
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