Rhodonite
Rhodonite is a manganese silicate mineral famous for its striking rose-pink to crimson color, typically streaked with black manganese oxide veins. It is the official state gem of Massachusetts. The contrast between the vivid pink mineral and the black vein pattern makes polished rhodonite one of the most visually dramatic lapidary materials. World-class crystals come from Broken Hill, Australia.
Physical Properties
Chemical Formula
MnSiO₃
Hardness (Mohs)
5.5–6.5
Color
Rose pink to deep red with black manganese oxide veins
Luster
Vitreous to pearly
Crystal System
Triclinic
Streak
White
Cleavage
Perfect in two directions
Specific Gravity
3.4–3.7
🔍 Field Identification Tips
Pink to deep red color with distinctive black manganese oxide veining (rhodochrosite is similar but has no black veins). Hardness 5.5–6.5. Two perfect cleavage directions. Heavier than typical silicates (SG ~3.5). Distinguished from rhodochrosite by hardness (rhodochrosite is softer, hardness 3.5–4) and presence of black veins.
Varieties & Forms
📍 Where to Find Rhodonite in the US
Uses & Applications
Cabochons, carvings, decorative objects, lapidary material. Massachusetts state gem.
💰 Collector Value Guide
Rough for lapidary: $5–$30/lb. Polished cabochons: $10–$100. Crystalline specimens: $50–$500. Transparent gem rhodonite: $50–$300/ct.
Find Rhodonite With Our Tools
Use the We Lick Rocks app to identify specimens, find dig sites, and connect with local rockhounds.