Fossil Leaf (Mimosite coloradensis) - Green River Formation Most of the commercial-grade cobaltoan

Most of the commercial-grade cobaltoan calcite is druzy crystals set on a matrix

leading to natural damage

commercial-grade citrine is often amethyst that has been heated to extreme temperatures

allowing you to still see their formation without having to spend a fortune

Fossil Leaf (Mimosite coloradensis) - Green River Formation Most of the commercial-grade cobaltoanThis fossil comes from the famous Green River Formation, living around 50 million years ago, during the Eocene. Related to the beech family, the best known group of this family are the oaks. The fruit of this tree usually produced a nut containing a single seed. These are often referred to as acorns! Length: 2. 3 x 2. 5 in. Weight: 5. 6 ozFossil Type & Species: Compression & Mimosite coloradensisLocation: Green River Formation, United StatesYou will