These are the semi-precious Aragonite Gemstone Components we currently have in stock. "Gem quality" Aragonite (the type used for calibrated and faceted stones) tends to be transparent and faintly green. The type used for beads and donuts (the type carried on our Jewelry Plus store) is pale yellow and is translucent to somewhat opaque. This is a very soft stone, so handle and store it with care. An interesting fact is that Pearls and Mother of Pearl are made primarily of Aragonite - pearl oysters and mussels utilize this mineral in the production of nacre.