Formula: (Mg,Fe²⁺)₉(SiO₄)₄(F,OH)₂
Mineral Class: Silicates
Crystal System: monoclinic
Mohs Scale: 6
Density (g/cm³): 3.17 - 3.35
Cleavage: poor
Colors: White, yellow (Pamir), orange (Pamir), reddish brown (Taymyr), brown
Luster: vitreous
Fluorescence: SW: yellow-orange
Pleochroism:
X: golden-yellow, brown-yellow, dark orange
Y: light yellow, yellow-orange
Z: colorless, light yellow, yellow-orange
Largest faceted Clinohumite: ?
Deposits: worldwide, in gem quality:
Kuchilal Mine / 50 km south of Khorog / Pamir Mts. / Tajikistan,
Epanko / Mahenge / Morogoro Region / Tanzania,
Uluguru Mts. / Morogoro Region / Tanzania, Taymyr District / Russia, Afghanistan
Discovery: 1876
1st Description: 1892
History:
• First description in 1892 by E.S. Dana.
• Discovery of the first Clinohumite in gem quality in Russia in 1983.
• Discovery of the second deposit of gemmy Clinohumite in Tanzania in 2005.

Clinohumite

Weight: 2.67 ct

Origin: Tanzania

Photo by kind permission of © www.bkkgemstones.com, Trent Anderson.

Clinohumite Mineral

Origin: Kuchilal Mine / 50 km south of Khorog / Pamir Mts. / Tajikistan

Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky.

Clinohumite

Weight: 0.56 ct

Origin: Tanzania

Photo by kind permission of © www.multicolour.com, David Weinberg.

Clinohumite

Weight: 6.60 ct

Origin: Kuchilal Mine / 50 km south of Khorog / Pamir Mts. / Tajikistan

Photo by kind permission of © www.americanthai.com, Scott Davies.

Clinohumite

Weight: 0.21 ct

Origin: Tajikistan

Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky.

Clinohumite

Weight: 0.41 ct

Origin: Tajikistan

Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky.

Clinohumite Mineral

Origin: Ladjuar Madan / Kokcha Valley / Afghanistan

Photo by kind permission of © Trinity Mineral Co., John Veevaert.

Clinohumite

Weight: 1.87 ct

Origin: Tanzania

Photo by kind permission of © www.multicolour.com, David Weinberg.