Strong Change Natural Alexandrite 13.55cts.
Dark green-violet-brown in daylight and red under incandescent light, the color change is strong. For an alexandrite, the stone is quite clean and well cut. Alexandrites this large are very rare.
Grade Score 8 / 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: |
vstbG*8/2 (very dark very strongly bluish green) |
| Phenomena: |
Change of color (Alexandrite effect) Pleochroism Strong |
| Color phenomena: |
stpR 6/4 (medium dark strongly purplish red) |
| Clarity |
|
| Clarity type: |
Eye clean (Type I) |
| Transparency: |
Transparent |
| Cut |
|
| Shape: |
Oval |
| Cut style: |
Step |
| Symmetry: |
Fair |
| Brilliance: |
Good |
| Polish: |
Exceptional |
| Size |
|
| Width: |
12.40 mm |
| Length: |
14.20 mm |
| Depth: |
9.50 mm |
| Weight: |
13.55 cts |
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