4.7ct Natural Dark Green Tourmaline Gemstone - October Birthstone

Tourmaline:

Tourmaline is a crystalline mineral that belongs to a group of complex borosilicate minerals. It is known for its wide range of colors and variations, making it a popular gemstone. Tourmaline crystals can form in various shapes, including long prismatic columns and thick, stubby crystals.

Name: Tourmaline

Dimensions: 20x6x4mm

Weight: 4.7ct

Treatment: None