Clinohumite

Facetable clinohumite is uncommon, and stones above 2–3 carats with good color and clarity are rare, so carat weight significantly influences value. Large, clean gems over 5 carats are particularly sought after by collectors.

Rich, saturated orange to orange-yellow hues are the most desirable, especially when they are bright rather than brownish or muddy. Stones with weak or uneven color are less valuable, and dull brown or heavily included material is mainly of specimen interest.

High-quality clinohumite should be eye-clean or nearly so; visible fractures and inclusions quickly reduce brightness and raise durability concerns. Because the rough is often included, clean stones are rare and command solid premiums.

Cutting must balance yield and durability. Mixed cuts and ovals that maximize brilliance and protect corners are preferred. Good polish and symmetry are important, as any dullness or windowing is obvious due to the stone's relatively high refractive index.

Gem-quality clinohumite has been found in limited quantities in Tajikistan, Tanzania, the Pamir Mountains and a few other metamorphic environments. Deposits are small, and there is no large-scale mining focused exclusively on gem clinohumite, making overall supply very restricted.

Demand is almost entirely collector-driven, focused on rare gem species enthusiasts and high-end colored stone buyers seeking unusual orange gems. Consumer awareness is minimal, and clinohumite has little presence in mainstream jewelry lines.

As interest in rare and exotic gemstones has grown, clinohumite has seen increased attention and firming prices for fine stones, though the overall market remains thin.