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.

Aragonite Properties, Facts and Photos

Coral Mineral, Gemstone Geology, Properties, Formation

Minerals, Free Full-Text

Calcite - Wikipedia

Rhodochrosite Meaning Properties Facts and Photos

14 Mineral Descriptions – Mineralogy

Gemstone - New World Encyclopedia

Minerals – Introduction to Earth Science

How precisely can one identify the geological region of the origin of a gemstone? - Quora

Healing Benefits: Rocks, Crystals, and Minerals

Crystals Rocks Minerals Understanding the Difference

Gem Formation: How are Gemstones Created? - Gem Society