Mineral Group · 9 minerals
Epidote & Zoisite
Minerals
9
Hardness
5-7 Mohs
Crystal Systems
Orthorhombic, Monoclinic, Non-crystalline +1 more
What Defines the Epidote Group
Calcium-aluminum silicates that form during metamorphism. The epidote group includes pistachio-green epidote and red piemontite. Zoisite produces three dramatically different gem varieties: blue-violet tanzanite, pink thulite, and green anyolite (ruby zoisite). All form through the transformation of existing rocks under heat and pressure.
Minerals in This Group
Dragon Blood Jasper
The Stone of Courage
Hardness 7·Epidote-Piemontite Rock
Epidote
The Stone of Increase
Hardness 6.5·Sorosilicate Group
Hemimorphite
The Light Blue Fan
Hardness 5·Sorosilicate Group
Piemontite
The Red Epidote
Hardness 6.5·Silicate Mineral (Epidote Group)
Ruby Zoisite
The Heart of Tanzania
Hardness 6.5·Silicate Mineral (Epidote Group)
Tanzanite
The Generation Stone
Hardness 6.5·Zoisite Family
Thulite
Norway's Pink Zoisite
Hardness 6.5·Silicate Mineral (Epidote Group)
Vesuvianite
The Volcano's Gemstone
Hardness 6.5·Silicate Mineral (Sorosilicate)
Zoisite
The Tanzanite Parent Mineral
Hardness 6.5·Epidote Group