Friedelite
Friedelite is a mineral that is unusual mostly found as opaque material prized for the colorful luminescense under UV light. Facetable crystals are extremely small and therefore, gems are tiny and very rare. Gems are really a gorgeous, sleepy red. Franklin, nj-new jersey is the origin that is primary of material.
| Crystallography: | Monoclinic – Prismatic |
| Crystal Habit: | Monoclinic, pseudohexagonal. As pseudohexagonal tablets, may be hemimorphic, to 1 cm; more rarely as slender needles or as fibrous or lamellar aggregates; stalactitic, massive, cryptocrystalline. Twinning: Universal, pseudorhombohedral symmetry. |
| Cleavage: | Perfect on [010] |
| Fracture: | Uneven |
| Tenacity: | Brittle |
| Moh’s Hardness: | 5.0 – 5.5 |
| Density: | 3.04 – 3.07 (g/cm3) |
| Radioactivity: | Not Radioactive |
| Color: | Pale pink, pinkish red, brownish red, dark red, brown |
| Transparency: | Translucent to Transparent |
| Luster: | Vitreous, pearly |
| Refractive Index: | 1.630 – 1.660 Biaxial |
| Birefringence: | 0.030 |
| Dispersion: | n/a |
| Pleochroism: | n/a |
