IGS Background

Hodgkinsonite Value, Price, and Jewelry Information


Hodgkinsonite is one of the rarest of all collector gems. Cut stones are bright and richly colored, but the crystals were never abundant and still fewer had transparent areas. Fewer than 10 cut stones may exist.

HomeGemstonesHodgkinsonite Value, Price, and Jewelry Information
By Joel E. Arem, Ph.D., FGA, updated on

Opticsa = 1.720; , β= 1.741; γ= 1.746.

Biaxial (- ), 2V= 52°.

Occurrence: in metamorphosed limestone at Franklin, New Jersey with various other Zn and Mn minerals. Individual crystals reached ¾ inch in diameter, in veins up to several inches thick. The material was mined out years ago.

Comments: Hodgkinsonite is one of the rarest of all collector gems. Cut stones are bright and richly colored, but the crystals were never abundant and still fewer had transparent areas. Fewer than 10 cut stones may exist.

Name: After H. H. Hodgkinson of Franklin, New Jersey, who discovered the mineral.

Never Stop Learning

When you join the IGS community, you get trusted diamond & gemstone information when you need it.

Become a Member

Get Gemology Insights

Get started with the International Gem Society’s free guide to gemstone identification. Join our weekly newsletter & get a free copy of the Gem ID Checklist!