Manganoan calcite
Variety CaCO3
Also called Mangano calcite
About it
Pale pink calcite carrying some manganese, often massive. Best told by its strong pink to red glow under UV; Franklin, New Jersey, has red-glowing calcite with green willemite.
- Type
- Variety
- Group
- Calcite variety
- Formula
- CaCO3
- Hardness (Mohs)
- 3
- Specific gravity
- 2.7–2.9
- Streak
- white
- Lustre
- vitreous (glassy)
- Crystal system
- Trigonal
- Colours
- pink, pale pink, white
- Transparency
- translucent, opaque
- Cleavage and fracture
- perfect rhombohedral in three directions
- Under UV light
- often bright pink to red under shortwave UV
Typical values: real specimens vary. For more, see mindat.org.