Grossular
| ID | 627 | |
|---|---|---|
| Mineral | Grossular | |
| Location | Akhtaragda River mouth - Vilyui River Basin - Mirninsky District - Russia | |
| Fluorescence | LW-UV: close SW-UV: close |
|
| Mindat.org |
View Grossular information at mindat.org |
|
Mindat data
| ID | 1755 |
|---|---|
| Long ID | 1:1:1755:4 |
| Formula |
Ca3Al2(SiO4)3
|
| IMA Status |
APPROVED GRANDFATHERED |
| Description | Garnet Group. Andradite-Grossular Series, Grossular-Katoite Series, Grossular-Uvarovite Series, Pyrope-Grossular Series. |
| Other Occurrences | Contact and regionally metamorphosed calcareous rocks. Rodingites |
| Industrial | Gem |
| Diapheny | Transparent,Translucent |
| Tenacity | brittle |
| Colour | Brown, orange, red, yellow, green, white, colorless, pink |
| Hardness (min) | 6.5 |
| Hardness (max) | 7.0 |
| About the name | Originally named "cinnamon stone" ("Kanelstein" in German) in 1803 by Abraham Gottlob Werner and renamed grossularite by Werner in 1808. Named for the colour of gooseberries (Ribes grossularium) as the original specimens were this colour. |
| Streak | White to pale Brownish white |
| Crystal System | Isometric |
| Cleavage Type | None Observed |
| Fracture type | Irregular/Uneven,Sub-Conchoidal |
| Morphology | Dodecahedra or trapezohedra, granular, compact, massive. May have hexoctahedral faces. Rarely tetrahexahedral or octahedral. |
| Twinning | Not observed |
| UV | Almost always non-fluorescent; may be a weak golden yellow (LW & SW) Some light green grossular garnets exhibit orange-red luminescence under long-wave and short-wave ultraviolet light. Results imply that chromium and manganese are the luminescence activators in grossular garnets, and vanadium is a powerful quencher. |
| shortcode_ima | Grs |
Details
Price: € 40
Dimensions: Not registered
Weight: Not registered
Visibile in overview:
Notes:
| Symbol | Element | |
|---|---|---|
| Al | Aluminium | |
| Ca | Calcium | |
| O | Oxygen | |
| Si | Silicium |