Strong Change Natural Alexandrite 10.20cts.
Dark greenish-brown in daylight and slightly pinkish red under incandescent light, the color change is excellent. For an alexandrite, the stone is quite clean and well cut. Alexandrites this large are very rare.
Grade Score 8 / 10
Clarity
Exceptional (5/5)
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: |
Pleochroism Change of color (Alexandrite effect) Strong |
| Color phenomena: |
slp/R*6/4 (medium dark slightly purplish red) |
| Clarity |
|
| Clarity type: |
Eye clean (Type I) |
| Transparency: |
Transparent |
| Cut |
|
| Shape: |
Oval |
| Cut style: |
Step |
| Symmetry: |
Good |
| Brilliance: |
Poor |
| Polish: |
Exceptional |
| Size |
|
| Width: |
10.90 mm |
| Length: |
15.80 mm |
| Depth: |
7.20 mm |
| Weight: |
10.20 cts |
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