Chabazite Value, Price, and Jewelry Information


chabazite - Nova Scotia
Chabazite: Nova Scotia (specimen ~ 3 inches across). Photo © Joel E. Arem, PhD, FGA. Used with permission.

Although faceting chabazite isn't too difficult, it's too soft for jewelry. However, only a handful of cut chabazites may exist because facetable material is extremely scarce.

Chabazite Value

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

Chabazite Information

DataValue
NameChabazite
Crystallography Hexagonal. Crystals rhomb-shaped, tabular; frequently twinned.
Colors Colorless, white, yellowish, pinkish, reddish white, salmon color, greenish.
Luster Vitreous
Fracture Uneven. Brittle.
Hardness 4-5
Specific Gravity 2.05 - 2.16
Cleavage Distinct 1 direction.
Luminescence None
Spectral Not diagnostic
Transparency Transparent to translucent.
FormulaCaAl2Si4O12 · 6H2O
Optics Variable; R.I. = 1.470 - 1.494. Uniaxial (+) or (-). See “Identifying Characteristics” below.
EtymologyOriginally named chabasie by Bosc d'Antic in 1780, later changed to chabazite. See “Comments” below.
OccurrenceCavities in basalt and other basic igneous rocks; also hot spring deposits.
chabazite - salmon pink
Salmon-pink “Chabazite on Heulandite,” Upper Quarry, New St., Paterson, New Jersey, USA. © Rob Lavinsky, www.iRocks.com. Used with permission.

Comments

Chabazite refers to a series of related minerals. This series include calcium (Ca), potassium (K), magnesium (Mg), sodium (Na), and strontium (Sr) dominant members. The sodium-dominant member is also known as herschelite.

This stone can show pale but attractive colors. Unfortunately, it’s too soft to wear (hardness 4 – 5) and rarely found in clean condition. Usually, faceters can cut only one corner of pinkish or colorless crystals, since they’re never entirely transparent. Even museum collections seldom possess cut material.

This rare, relatively little-known gem has a poetic but mangled etymology. The name “chabazite” comes from a poem attributed to the poet Orpheus from Greek mythology. However, the actual source, the 4th century CE Orphic Lithica of Pseudo-Orpheus, refers to chalazias, a stone said to be like hail. According to this mystical work, the stone purportedly cooled passions and cured fevers and snakebites. Evidently, its magical purview doesn’t include typos. The “b” in the modern name came from a misspelling in a text of the poem used in the 18th century.

What was chalazias? Possible identities for this gem range from quartz to diamond. Chabazites have been found in Greece, Cyprus, and the Aegean region, too.

Identifying Characteristics

Chabazite’s optic sign may vary. It may be uniaxial positive or negative.

chabazite - phacolite
Phacolite is a lens-shaped variety of chabazite. These form due to twinning/multiple twinning of rhombohedrons, shapes hexagonal or trigonal crystal structures may take. “Chabazite (Var. Phacolite),” Gads Hill, Upper Mersey Valley, Tasmania, Australia. © Rob Lavinsky, www.iRocks.com. Used with permission.

Synthetics

Labs have created synthetic minerals, like SSZ-13, isostructural with chabazite. (They share the same crystal structure but not the same chemical composition). These materials only have industrial uses.

Sources

  • United States: California; Colorado; Hawaii; Nevada; New Jersey; Oregon.
  • Canada: Bay of Fundy district, Nova Scotia.
  • Australia; Czech Republic; Germany; Greenland; Hungary; India; Ireland; Italy; Russia; Scotland; Slovakia.

Stone Sizes

Cut chabazites are always very small, usually less than 1-2 carats.

Care

You’re more likely to find chabazites in mineral collections, if at all, than in jewelry collections. These gems have significantly lower hardness than common jewelry stones, such as quartz and topaz, not to mention diamond. Therefore, store them separately from other gems to avoid contact scratches. For cleaning, use a soft brush, mild detergent, and warm water. Consult our gemstone jewelry cleaning guide for more recommendations.

chabazite - Tasmania
“Chabazite,” Wadamana, Central Tasmania. © Rob Lavinsky, www.iRocks.com. Used with permission.