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Brilliant orange Mandarin garnet oval weighting 10.94 cts, from
Brilliant orange Mandarin garnet oval weighting 10.94 cts, from East Africa. Mandarin garnet or Spessartite, is a rare form of garnet with an unusual...

Congratulations John Bradshaw for winning our Gems of Day
Congratulations John Bradshaw for winning our Gems of Day competition! The correct answer is Kornerupine. You nailed both stone name and origin (Tanz...

Phenakite is a rare beryllium mineral that is not often used as a
Phenakite is a rare beryllium mineral that is not often used as a gemstone. Its name derives from the Greek word phenakos meaning deceiver, a name acq...

Most alexandrites show either a nice color in daylight or an
Most alexandrites show either a nice color in daylight or an attractive color under incandescent light. Rarely are both colors bright and vivid and of...

In this video, Color Change Sapphire weighing 3.61 cts, from
In this video, Color Change Sapphire weighing 3.61 cts, from Songea, Tanzania. While many sapphires may exhibit faint color changes upon exposure to ...