HIDDENITE
Hiddenite: Green Spodumene, Properties & Identification
Hiddenite is a green gem variety of spodumene, a lithium aluminum silicate mineral. Its color is often associated with chromium. The name is linked to the mineral’s discovery in North Carolina, and fine transparent crystals are valued by collectors and gem enthusiasts.
Table of Contents
Formation and Geological Setting
Hiddenite occurs in lithium-rich pegmatites, where spodumene crystallizes from evolved granitic melts. Its color and clarity vary, and well-formed crystals can be elongated and striated.
Properties and Appearance
Spodumene has a Mohs hardness around 6.5–7, strong cleavage, and a monoclinic crystal system. Hiddenite is usually green, but hue can vary. Cleavage makes it vulnerable to splitting from impact despite its reasonable hardness.
Identification and Collecting
Distinguish hiddenite from other green gems using refractive properties, optical examination, inclusions, and where needed chemical analysis. Avoid relying on color or locality stories alone.
Care and Handling
Hiddenite is cleavage-prone and should be protected from knocks and sudden temperature changes. Gentle soap and water may be appropriate for stable stones, but avoid ultrasonic and steam cleaning. Store separately.
Frequently Asked Questions
Can this material be identified by color alone?
No. Color overlaps among minerals and gem materials; use reliable references and appropriate testing when certainty matters.
Is every specimen suitable for jewelry?
No. Durability depends on cleavage, fractures, inclusions, treatments, and setting. Store and wear specimens with appropriate care.
Further Reading & Sources
- Mindat — mineral data and localities.
- Handbook of Mineralogy — technical descriptions.
- Gemological Institute of America — gem education and identification.
- Wikipedia: Hiddenite — general background and references.