Coral Mineral, Gemstone Geology, Properties, Formation

Coral is skeletal material produced by marine animals. Coral is organic and created by living organisms. The hardened skeleton remains and this material is used as a gemstone.

Are Gemstones Minerals? If So What Types?

Blog — Sagestone Gallery Crystals, Minerals, Jewelry, Fossils & Home Decor in the heart of Sebastopol, CA

Coral Mineral, Gemstone Geology, Properties, Formation

Calcite : Properties, Formation, Occurrence and Uses Areas

3 Minerals – An Introduction to Geology

The Rock and Gem Book Rocks and gems, Rock, Rocks and minerals

Agatized Coral, Metaphysical Healing Properties

Agate - Wikipedia

Organic Gemstones: Amber, pearl, jet, dinosaur bone and more!

silica group of gemstones