Rhodolite is a mixture of pyrope, almandine, and spessartine. To be classified as Rhodolite, the SG should be 3.74-3.85 and RI 1.735-1.755 (slight variations in limit values may exist depending on the source). However, the values overlap with standard pyrope, and in some cases, the color determines whether it is a rhodolite or not. There is no difference for the cutter.

Physical Properties:

Chemistry: (Mg,Mn,Fe)+23Al2(SiO4)3
Hardness: 7.25
SG: 3.74–3.85
Cleavage: None
Fracture: Sometimes slightly brittle
Thermal Sensitivity: None

Optical Properties:

RI: 1.735–1.755
Dispersion: 0.026 (medium)
Double Refraction: None
Pleochroism: None
Critical Angle: 34.5°

Facet Angles (pavilion/crown):

Vargas: 41°/40°
Olson: 39°/37°
Soukup: 42°/37°
Roth: 42°/37°
MDR: 42°/37°
Schlagel: 40°/36°
Hashnu: 41°/39°
Sinkankas: 40°/40°
GIA: 42°/37°
Perkins: 42°/37°
Raytech: 40°/38°
Cornwall: 40°/34°
Weikoff: 42°/39°
Carroll: 42.1°/35.3°

Cutting lap:

Medium - fine

Facet Polishing:

Vargas: Aluminum oxide on tin/lead, tin oxide on tin
Olson: Chrome oxide on tin
Soukup: Aluminum oxide on tin or tin/lead
Christiansen: Aluminum oxide on tin/lead, tin oxide on tin
Perkins: Aluminum oxide on BATT or Corian
MDR: Tin or aluminum oxide on tin, aluminum oxide on type metal

Cabochon Polishing:

Olson: Chrome oxide on leather
Christiansen: Aluminum, tin, or chrome oxide on leather or wood
Cox: Aluminum or chrome oxide on leather, cerium oxide on felt
Covington: Chrome or cerium oxide on felt


For best yield




Rhodolite is often too brittle for coarse or new Cutting laps.

Rhodolite Raw Stone

Rhodolite on Gemdat

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