Proustite
| ID | 56 | |
|---|---|---|
| Mineral | Proustite | |
| Location | St. Jahannes Mine - Wolkenstein - Saxony - Germany | |
| Fluorescence | LW-UV: close SW-UV: close |
|
| Mindat.org |
View Proustite information at mindat.org |
|
Mindat data
| ID | 3294 |
|---|---|
| Long ID | 1:1:3294:6 |
| Formula |
Ag3AsS3
|
| IMA Status |
0 1 |
| Other Occurrences | A late forming mineral in hydrothermal veins, also in the supergene zone. |
| Industrial | ore of silver |
| Discovery Year | 1832 |
| Cleavage |
Distinct on |
| Tenacity | brittle |
| Colour | Scarlet, Vermilion or reddish gray |
| Hardness (min) | 2.0 |
| Hardness (max) | 2.5 |
| Luminescence | None |
| Lustre | Sub Metallic |
| About the name | Named by François S. Beudant in 1832 in honor of Joseph-Louis Proust (26 September 1754, Angers, France – 5 July 1826, Angers, France), chemist and actor, for Proust's work on the red silver minerals (proustite-pyrargyrite series). He is most famous for discovering the law of definite proportion, stating that chemical compounds always combine in constant proportions. |
| Streak | Vermilion red |
| Crystal System | Trigonal |
| Cleavage Type | Distinct/Good |
| Fracture type | Irregular/Uneven,Conchoidal |
| Morphology | Prismatic crystals to 8 cm, also scalenohedral crystals. |
| Twinning |
|
| Comment Luster | Darkens on exposure to light |
| key_elements |
0 1 |
| shortcode_ima | Prs |
| Group | Proustite Group |
Details
Price: € 5
Dimensions: Not registered
Weight: Not registered
Visibile in overview:
Notes:
| Symbol | Element | |
|---|---|---|
| Ag | Silver | |
| As | Arsenic |
|
| S | Sulfur |