Ruby in Fuchsite
Muscovite var. Fuchsite with Corundum var. Ruby · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Monoclinic (Fuchsite matrix) and Trigonal (Ruby inclusions); usually found as massive or tumbled aggregates.
Mineral Group
Silicates (Mica Group) and Oxides (Corundum Group)
Chemical Formula
K(Al,Cr)2(AlSi3O10)(OH)2 + Al2O3:Cr
Formation Process
Metamorphic; typically forms in chromium-rich metamorphic rocks where aluminum and silica are present under high pressure and temperature.
About This Crystal
An opaque, mottled stone featuring a vibrant sea-green to emerald-green matrix of fuchsite mica, often containing distinct hexagonal or rounded purplish-red ruby inclusions. Luster is vitreous to pearly on the green sections and dull to sub-vitreous on the rubies.
Physical Characteristics
Color: Green with red/pink spots; Streak: White; Cleavage: Perfect basal in mica, none in ruby; Fracture: Uneven; Specific Gravity: 2.8-3.0; Fluorescence: Rubies often glow bright red under long-wave UV light due to chromium content.
Optical Properties
Refractive Index: 1.55-1.59 (Fuchsite), 1.76-1.77 (Ruby); Doubly refractive; Rubies may show pleochroism from purplish-red to orangey-red.
Hardness & Durability
Origin Region
Southern India (notably Karnataka region), Madagascar, and Russia.
Hardness & Durability
Variable; Fuchsite matrix is soft (Mohs 2-3), while Ruby inclusions are very hard (Mohs 9). Poor overall durability for daily jewelry due to the soft matrix.
Care & Maintenance
Clean only with warm soapy water and a soft cloth; avoid ultrasonic cleaners, steam, and harsh chemicals. Store separately to prevent the soft green matrix from being scratched by other gems.
Rarity & Value
Common; widely available as tumbled stones and decorative carvings. Value is determined by the contrast between the green and red colors and the size/definition of the ruby crystals.
Special Characteristics
Often confused with Ruby in Zoisite (Anyolite); however, Fuchsite is much softer. The rubies frequently exhibit a blue or white 'reaction rim' of kyanite or muscovite around their edges.
Lore & History
Historically used as a decorative stone. In metaphysical traditions, it is believed to blend the 'heart-centered' energy of green fuchsite with the 'vitality' of red ruby; often associated with the Heart and Root chakras.