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BerylA cut heliodor beryl stone of 135.93 carats. Beryl comprises of beryllium aluminum silicate
Chrysoberyl cut stoneThis is Alexandrite, a cushion-shaped Chrysoberyl (beryllium aluminum oxide) gemstone. Alexandrite is named after the former czar of Russia, Alexander II
Alexandrite crystalsA cluster of the gemstone alexandrite trillings, or twinned crystals. This gemstone was named after the Russian Tsar Alexander II. It can appear in both red or green
Phenakite is comprised of (beryllium silicate). Visually it closely resembles quartz, but chemically it is closer to gemstones such as topaz and beryl
Beryl, variety aquamarineA specimen of the gemstone, Beryl (Beryllium aluminum silicate). This is the aquamarine variety, which is the blue variety. Another variety of beryl is emerald, which is the green variety
Emerald crystals and cut stoneEmerald is a variety of beryl (beryllium aluminum silicate). The rich, green colour is attributed to small amounts of chromium which is unmatched by any other mineral species
Beryl crystalsBeautifully formed beryly variety crystals of aquamarine, heliodor, morganite and emerald. Beryl comprises of (beryllium aluminum silicate)
EmeraldsEmerald is a variety of beryl (beryllium aluminum silicate). The green colour is attributed to small amounts of chromium. Specimens from the Natural History Museum, London
AlexandriteA twinned alexandrite crystal. Alexandrite is a variety of chrysoberyl (beryllium aluminum oxide) and is named after the former Czar of Russia, Alexander II
Emerald on calciteWell-formed hexagonal crystals of emerald on calcite. Emerald is a variety of beryl (beryllium aluminum silicate). The green colour is attributed to small amounts of chromium
BerylDeposits of the green variety of beryl (beryllium aluminum silicate) known as emerald. Specimens oginally from Ekatrinberg, Russia, now at the Natural History Museum, London
BerylA specimen of beryl (beryllium aluminum silicate). There are several varieties of beryl, aquamarine (blue), emerald (green), goshenite, heliodor and morganite
Emerald, a variety of berylA cut teardrop stone and a prismatic crystal of the green variety of beryl (beryllium aluminum silicate) known as emerald. Specimen from the Natural History Museum, London
BerylFrom left to right, different varieties of berly (beryllium aluminum silicate) cut stone; emerald, aquamarine, morganite and heliodor
Faceted chrysoberylTwo cut stones of the gemstone chrysoberyl (beryllium aluminum oxide). This stone is also known as cats eyes
Chrysoberyl cats eyesTwo stones of Chrysoberyl (beryllium aluminum oxide), illustrating the similarity the gemstone has with a cats eye