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Alexandrite

Tsarstone collectors guide

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.

Strong Change Natural Alexandrite 10.20cts.
Natural Alexandrite Oval 10.2 cts Natural Alexandrite Oval 10.2 cts

Grade Score 8 / 10

Color
Very good (4/5)
Cut
Good (3/5)
Carat
Very large (5/5)
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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