Certified Strong Change Alexandrite 21.23cts
Dark blue green in daylight and purple- red under incandescent light, the color change is strong and attractive. Although the clarity is not that good, alexandrites this large are extremely rare. An antique setting might be the best way to set this stone. The cutting and proportions are quite good.
Grade Score 7 / 10
Rarity
Extremely rare (5/5)
Price information
Availability information
Detail identification and grading report
| Identification |
|
| Type: |
Natural |
| Species: |
Chrysoberyl |
| Variety: |
Alexandrite |
| Origin: |
Tunduru, Ruvuma, Ruvuma Region, Tanzania |
| Hardness: |
8.5 |
| Density: |
3.75 |
| RI-1: |
1.741 |
| RI-2: |
1.76 |
| Enhancements |
|
| Variety of work: |
Faceted |
| Designation: |
A (Not currently known to be enhanced) |
| Color |
|
| Color light source: |
Cool daylight |
| Color description: |
GB/BG*6/2 (medium dark green blue or blue green) |
| Phenomena: |
Change of color (Alexandrite effect) Pleochroism Strong |
| Color phenomena: |
RP/PR 5/3 (medium red-purple [pink]) |
| Clarity |
|
| Clarity type: |
Severely included (Type I) |
| Transparency: |
Transparent |
| Cut |
|
| Shape: |
Cushion |
| Cut style: |
Step |
| Symmetry: |
Fair |
| Brilliance: |
Poor |
| Polish: |
Good |
| Size |
|
| Width: |
11.90 mm |
| Length: |
16.02 mm |
| Depth: |
11.33 mm |
| Weight: |
21.23 cts |
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