Kunzite

Crystal system · Monoclinic

Identity

Formula

LiAlSi2O6

IMA symbol

Spd

Strunz class

9.DA

Crystal system

Monoclinic

Point group

2/m

Rarity

uncommon

Collector tier

cabinet classic

Type locality

Pala, California, USA

Physical properties11 recorded

Hardness

6.5–7.5 (Mohs)

Specific gravity

3.15–3.2

Refractive index

1.66–1.676

Birefringence

0.014

Dispersion

0.017

Optic character

biaxial (+)

Luster

vitreous

Diaphaneity

transparent

Tenacity

brittle (fragile)

Cleavage

perfect · 2 prismatic ~87°

Fracture

subconchoidal

Treatment & disclosurebuyer information

Irradiationoccasionalunstable

Color may fade in sunlight; "irradiated kunzite" should be stored protected.

Detection: moderate

Safety & handling1 hazard

light sensitivemoderate

Pink color may fade in direct sunlight — especially irradiated material.

Handling: Indirect lighting; cabinet display preferred.

Notable localities2

Pala DistrictUSA · California
Kunar ValleyPakistan · Khyber Pakhtunkhwa