metamorphic

Ruby in Fuchsite

Corundum var. Ruby in Chromium Muscovite rock

AI-generated identification · may be incorrect

Hardness: 2.5 - 3 for Fuchsite matrix, 9 for Ruby (corundum) inclusions; Color: mint to emerald green matrix with magenta/pinkish-red crystal spots, often surrounded by white/blue-green kyanite halos; Luster: vitreous to pearly; Specific Gravity: approximately 2.8 - 3.2 depending on corundum concentration.

Hardness: 2
Luster: vitreous to pearly

Identified October 3, 2026More metamorphic →

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Physical properties

Formation & geological history

Formed through regional metamorphism involving chromium-rich aluminous sediments or altered ultramafic rocks. The chromium provides both the green color of the mica (fuchsite) and the vivid red color of the ruby inclusions.

Uses & applications

Predominantly used as an ornamental stone, lapidary carvings (such as spheres, eggs, and figurines), cabochons for jewelry, and collector specimens.

Geological facts

Under long-wave ultraviolet light (UV), the ruby crystals fluoresce a bright, vivid crimson/pink glow due to trace chromium activation. It is often confused with Ruby in Zoisite (Anyolite), but Ruby in Fuchsite typically features lighter minty-green coloration, softer mica-rich matrix, and distinctive alteration rims/halos around the rubies.

Field identification & locations

Most commonly sourced from Southern India and parts of Africa (such as Zimbabwe). Readily identified by testing hardness (the green matrix scratches easily with a knife, while the red ruby centers are extremely hard and will scratch glass or quartz) and examining reaction under UV light.