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Alexandrite

Tsarstone collectors guide

Certified Natural Alexandrite Cushion 4.12cts

Yellowish green in daylight and grayish violet under incandescent light, the color change is strong. The stone is bright and quite clean and the cut and polish are good.

Certified Natural Alexandrite Cushion 4.12cts
Natural Alexandrite Cushion 4.12 cts Natural Alexandrite Cushion 4.12 cts

Grade Score 8 / 10

Color
Very good (4/5)
Cut
Good (3/5)
Carat
Large (4/5)
Clarity
Very good (4/5)
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 5/3vstbG 5/3 (medium very strongly bluish green)
Phenomena: Change of color (Alexandrite effect) Pleochroism Strong
Color phenomena: RP/PR 5/3 (medium red-purple [pink])
Clarity
Clarity type: Slightly included (Type I)
Transparency: Transparent
Cut
Shape: Cushion
Cut style: Step
Symmetry: Good
Brilliance: Very good
Polish: Exceptional
Size
Width: 8.87 mm
Length: 9.18 mm
Depth: 5.78 mm
Weight: 4.12 cts
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