Catalogued specimens
1,284
+38 this quarter
Mean hardness
5.4 Mohs
+0.2 vs. 1811
Pending verification
17
+5 awaiting test
Plate completeness
96.2%
+1.4 pts
| No. | Specimen | Hardness | Defining test | Status | Rec. |
|---|---|---|---|---|---|
| 01 | Talc | 1.0 | Marked by fingernail | Verified | ··· |
| 02 | Gypsum | 2.0 | Scratched by fingernail | Verified | ··· |
| 04 | Fluorite | 4.0 | Scratched by steel knife | In review | ··· |
| 06 | Orthoclase | 6.0 | Scratches window glass | Verified | ··· |
| 07 | Quartz | 7.0 | Scratches hardened steel | Verified | ··· |
| 09 | Corundum | 9.0 | Scratched only by diamond | Archived ref. | ··· |
| 10 | Diamond | 10.0 | Scratches all others | In review | ··· |