Gemstones, Diamonds, Pearls -
My Shopping Cart My Account Gem Library
|Welcome to|Single Stones|Calibrated Stones|Pairs|Mix Lots|Closeouts|Carved Gems|lapidary and gemological tools and supplies|Gem Smart Search|
 Home / Gem Library / Natural Gemstones / Clinohumite October 16, 2019  

Natural Clinohumite
E-mail this article to a friend

There are 3 Clinohumite(s) available at

The only known deposits of gem quality Clinohumite were discovered in the Pamir Mountains, Tadzhikistan in 1983; and in Mahenge, Tanzania in 2005. A member of the monoclinic system, transparent clinohumite is an extremely rare gemstone.

Known Facts
Color Key: Brown, yellow, white, orange, or reddish brown
Refractive Index: 1.625 1.668
Pleochroism: Brownish yellow or pale
Chemical Composition: Magnesium Silicate Fluoride OH
Hardness: 6 - 6.5
Density: 3.17 - 3.35
Crystal Group: Monoclinic
Ocurrence: Extremely rare - gem quality found only in the Pamir Mountains, Tadzhikistan. Other mineralogical occurrences include, Mt. Vesuvius, Italy; Pargas, Finland; Llanos de Juanar, Malaga, Spain; Tilly Foster Mine, New York; Fort Defiance, Apache County, Arizona; Crestmore Quarry, Riverside County and Lower Lake, Fresno County, California; Luna, New Mexico and Franklin, New Jersey, USA.

Clinohumite is a mineral found as small grains in the marbles of contact metamorphic environments. It has been cut as a brilliant yellow-orange gemstone and is sought after by collectors because of its rarity. The intensity and the beauty of the orange color are important and inclusions are common and accepted. It was first discovered in the metamorphosed limestone blocks that were ejected by the volcano Mt. Vesuvius, near Napoli, in Italy.

Clinohumite is a fluorescent mineral and will glow a tan to yellow-orange color when subjected to shortwave UV light. It is similar in fluorescent color to the bright humite material found at Franklin, New Jersey. Humite is a related species to clinohumite as might be expected by their names. Clinohumite is named in allusion to its monoclinic symmetry as opposed to humite's orthorhombic symmetry. Clinohumite's structure is often intergrown with humite's structure in the same crystal

Clinohumite, like humite, is a member of the Humite Group of minerals. Class: Silicates , Subclass: Nesosilicates Group: Humite. Members of the humite group are noted for having a mixture of silicate and oxide layers in their structures. The silicate layers have the same structure as olivine and the oxide layers have the same structure as brucite. Clinohumite has four stacked olivine layers that alternate between the brucite layers. Associated Minerals include humite, talc, geikielite, lazurite, dolomite and calcite.

Crystal Habits include small prismatic or rounded crystals. Lamellar twinning is common. The luster is vitreous to resinous and the streak is white. Cleavage is poor and in one direction,- basal. Crystals are transparent to translucent and the fracture is brittle to conchoidal producing small conchoidal fragments.

Clinohumite Clinohumite Clinohumite Clinohumite Clinohumite Clinohumite
Check our Top, Largest, Smallest or Latest Clinohumite's.

Clinohumite Stats/
Popularity Index: 96426hits
Total Items: 3items
Total Weight: CTS 11.58
Cheapest: USD 184.00
Most Expensive: USD 890.40
Largest: CTS 6.35
Smallest: CTS 2.30
Last Added: 06/16/17 09:16:47

Knowledge Search/
Enter Keywords:
Enter one or more keywords (i.e madagascar sapphires ).

About Gemstones /

Gem Library/
Gems Legend and  Lore Gems Legend and Lore
Some of the latest of ways that gems have been associated with Birthstones and Signs of the Zodiac.
Understanding Gemstones Understanding Gemstones
Learn about Physical and Optical properties, color, clarity and cut of gemstones.
Gems Glossary Gems Glossary
Ever wonder what are "Blemish", "Luster", "Saturation" "Uniformity" or "Mine Run" means?
Reference and  Links Reference and Links
Recommended books and links to Gem, Jewelry&Mineral Magazines, Gem Institutes and Labs.

Book’s Corner/
Buy at Ruby & Sapphire by Richard W. Hughes
Price: USD 98.00
"This book is surely the best study ever done on the exotic subject of rubies and sapphires..."
see more recommendations

 Top of Page Need help?  

Gemstones for sale: Alexandrite, Garnet, Diamond, Opal, Spinel, Sapphire, Tourmaline, Tanzanite, Tsavorite,
Gemstones by Category: Calibrated, Carving, Closeout, Mixed Lot, Pair, Rough, Single, Best Sellers or Featured Gemstones.
Gemstone education: Colored Gemstones Guide, Gems Library, Gemstone Treatments, Gemstone Glossary, Gems and Astrology,

A BBB Accredited Business All Transactions secure by Thawte certificate - click here to validate Ebay Power Seller Gem Certification Various Shipping Options Major Credit Cards Accepted

All trademarks and logos shown herein are the property of their respective owners. © Copyright, 1998-2011. All rights reserved. Use of this site constitutes acceptance of Return Policy, Privacy Policy and Trading Guarantee. Published and operated by David Wein Ltd. 32 Hollywood Road, Central, Hong Kong Island Hong Kong. Lost? Check site map or resources page.

Site design and maintenance by NetComposite ®.