A very nice Congo tourmaline that shows an almost tsavorite garnet-like gree color with a slight blue secondary tone. It has a dark c-axis, so it…
This is a nice green tourmaline with a somewhat chrome-like color resembling a tsavorite garnet. It has a slightly darker “c” axis…
This stone is a dead ringer for a TOP color tsavorite garnet. It has an excellent, slightly bluish medium dark green color and outstanding brilliance.…
Taaffeite reacts to most gemological tests like mauve-colored spinel, but can be distinguished on the basis of its birefringence. Additional…
Idocrase is one of the lesser known and more beautiful collector gems. When properly cut it is as bright and attractive as the grossular garnets,…
The spectroscope is a device that separates white light into an optical spectrum of component colors that can aid in gemstone and mineral identification.…