Cinnabar Value, Price, and Jewelry Information

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“Cinnabar,” Lovelock, Pershing Co., Nevada, USA. © Rob Lavinsky, www.iRocks.com. Used with permission.

Cinnabar

Magnificent red cinnabar is extremely soft and fragile, so faceted material is rare. It’s cut primarily for collectors and carvings.

Cinnabar Value

The International Gem Society (IGS) has a list of businesses offering gemstone appraisal services.

Cinnabar Value via Gem Price Guide

Accompanying value information:

Not found

Cabochons	All sizes
	to /ct

Cinnabar Information

Data	Value
Name	Cinnabar
Crystallography	Hexagonal. Usually massive, fine grained; crystals are prismatic or rhombohedral and characteristically twinned, especially those from China.
Refractive Index	2.905-3.256
Colors	Scarlet red, brownish red, brown, black, gray.
Luster	Adamantine to submetallic; massive varieties dull, earthy.
Hardness	2 - 2.5
Wearability	Poor
Fracture	Fracture conchoidal to uneven
Specific Gravity	8.09
Birefringence	0.351 (very large).
Cleavage	Perfect 1 direction
Dispersion	Over 0.40.
Luminescence	None.
Luminescence Present	No
Transparency	Transparent crystals, rare. Translucent to opaque.
Absorption Spectrum	Not diagnostic.
Formula	HgS
Optics	o = 2.905; e = 3.256. Uniaxial (+).
Optic Sign	Uniaxial +
Etymology	Unknown, possibly from Sanskrit.
Occurrence	Cinnabar is a mineral of low temperature ore deposits; also in veins, igneous rocks, and around hot springs. Crystals are very rare.

Cinnabar: Charcas, Mexico (1.37). Photo © Joel E. Arem, PhD, FGA. Used with permission.

Comments

Cinnabar carvings from China appear regularly on the market but aren’t abundant. Be advised that people have used this material to make a red pigment since antiquity. Some so-called “cinnabar carvings” you may find are actually wood pieces painted with cinnabar lacquer.

Chicken blood stone’s red color is due to the presence of cinnabar. Jadeite may also contain traces of this mineral.

Although commonly associated with the color red, specimens may range from brown to gray and even black.

“Cinnabar Beads,” carved lacquer beads, by Pschemp. Licensed under CC By-SA 3.0.

Sources

Hunan Province, China yields the world’s finest crystals. Crystalline cinnabar is very rare.

Other notable sources include:

United States: Arkansas, California, Nevada, Texas, Utah.
Bosnia and Herzegovina; Germany; Italy; Mexico; Peru; Russia; Serbia; Spain.

“Cinnabar on Dolomite,” Tongren Mine, Tongren, Guizhou, China. © Rob Lavinsky, www.iRocks.com. Used with permission.

Stone Sizes

Cut specimens are extremely small, normally less than 3 carats. Some rough exists that might cut up to 50 carats. Fine transparent Chinese crystals are unlikely to be cut, since they’re extremely valuable as mineral specimens.

Gem cutters can make cabochons up to several inches in size from massive cinnabar.

Devonian Group (Calgary, Alberta, Canada): 2.68 (red, Mexico).
Private Collections: 22.15, 13.91 (red, China); 19.87 (red pear shape, China).

“Cinnabar,” Culver-Baer Mine, North Fork Little Sulfur Creek, Sonoma Co., California, USA. Crystal needles in matrix. © Rob Lavinsky, www.iRocks.com. Used with permission.

Care

Cinnabar contains mercury. Avoid inhaling dust or fumes and wash your hands after working with this material, especially massive specimens. See the Agency for Toxic Substances and Disease Registry profile on mercury for more information.

Since cinnabars have a hardness of 2, store any jewelry separately from other stones to avoid contact scratches. Clean only with a soft brush, mild detergent, and warm water. Consult our gemstone jewelry cleaning guide for more recommendations.