Mineral Group · 16 minerals
Feldspar Group
Minerals
16
Hardness
4-6.5 Mohs
Crystal Systems
Triclinic, Monoclinic, Cubic +2 more
What Defines the Feldspar Group
Feldspars make up roughly 60% of Earth's crust, making them the most abundant mineral group on the planet. The family splits into potassium feldspars (moonstone, amazonite) and plagioclase feldspars (labradorite, sunstone). Their optical phenomena - adularescence, labradorescence, aventurescence - make them favorites among gem collectors.
Minerals in This Group
Amazonite
The Hope Stone
Black Moonstone
The Dark Moon Crystal
Cat's Eye Moonstone
The Dual-Phenomenon Feldspar
Hackmanite
The Color-Changing Sodalite
Labradorite
The Stone of Transformation
Larvikite
The Norwegian Moonstone
Moonstone
The Traveler's Stone
Oligoclase
The Sunstone Mother Mineral
Oregon Sunstone
The Copper-Lit State Gem
Orthoclase
The Foundation Feldspar
Peach Moonstone
The Warm Glow of Adularescence
Rainbow Lattice Sunstone
One-mine Australian gem
Rainbow Moonstone
The Labradorite in Disguise
Sodalite
The Poet's Stone
Sunstone
The Stone of Light
Tugtupite
The Reindeer Stone