Statements (13)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:jewelry
|
| gptkbp:appearance |
green to red color change
|
| gptkbp:color_change_effect |
yes
|
| gptkbp:composed_by |
Al2 O3: Cr
|
| gptkbp:created_by |
Verneuil process
|
| gptkbp:difficulty |
8.5 on Mohs scale
|
| gptkbp:discovered_by |
gptkb:20th_century
|
| https://www.w3.org/2000/01/rdf-schema#label |
synthetic Alexandrite
|
| gptkbp:origin |
laboratories
|
| gptkbp:price |
generally lower than natural Alexandrite
|
| gptkbp:uses |
gptkb:jewelry
|
| gptkbp:bfsParent |
gptkb:natural_Alexandrite
|
| gptkbp:bfsLayer |
7
|