Hectorite
A variety of Minerals
What is Hectorite?
Hectorite is a rare soft, greasy, white clay mineral with a chemical formula of Na0.3(Mg,Li)3Si4O10(OH)2. Hectorite was first described in 1941 and named for an occurrence in the United States near Hector (in San Bernardino County, California, 30 miles east of Barstow.) Hectorite occurs with bentonite as an alteration product of clinoptilolite from volcanic ash and tuff with a high glass content. Hectorite is also found in the beige/brown clay ghassoul, mined in the Atlas Mountains in Morocco. A large deposit of hectorite is also found at the Thacker Pass lithium deposit, located within the McDermitt Caldera in Nevada. The Thacker Pass lithium deposit could be a significant source of lithium. Despite its rarity, it is economically viable as the Hector mine sits over a large deposit of the mineral. Hectorite is mostly used in making cosmetics, but has uses in chemical and other industrial applications, and is a mineral source for refined lithium metal.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Hectorite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Hectorite Localities Map
See where Hectorite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Hardness (Mohs)
- 1 - 2
Chemical Properties
- Chemical Formula
- Na0.3(Mg,Li)3(Si4O10)(F,OH)2
- Elements
- F, H, Li, Mg, Na, O, Si
Also Known As
Identify Hectorite Instantly
- Snap a photo, get instant results
- 6,700+ rocks, minerals & crystals
- Discover collecting spots near you
Hectorite FAQs
How do I identify Hectorite?
Hectorite can be identified by its hardness of 1 - 2 on the Mohs scale. Look for these key characteristics when examining specimens.
How hard is Hectorite?
Hectorite has a hardness of 1 - 2 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
%252FAbenakiite-(ce)-01.jpg&size=small)
