Azurite

- natural, flat back 

Azurite is a soft, deep blue copper mineral that forms when carbon dioxide-rich groundwater reacts with copper ores underground. Azurite is known for its striking color, which ranges from deep blue to violet-blue, and is similar to lapis lazuli. It's often found in tabular or prismatic crystals with vitreous faces, and can be cut into cabochons for jewelry.

Azurite, often referred to as the Stone of Heaven, is a soft, prismatic crystal known for its vibrant blue color, and it symbolizes inner strength and emotional balance.