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Alexandrite

Tsarstone collectors guide

Certified Strong Change Alexandrite 26.75cts

Bluish green in daylight and purple red under incandescent light, the color change is exceptionally strong and attractive. The change apparent without even changing the lights. Alexandrites this large are extremely rare and this is a special stone. Although the clarity is not that good, this is a stone with character and I would keep it if I could. An antique setting might be the best way to set this stone. The cutting and proportions are good.

Certified Strong Change Alexandrite 26.75cts
Natural Alexandrite Cushion 26.75 cts Natural Alexandrite Cushion 26.75 cts

Grade Score 7 / 10

Color
Good (3/5)
Cut
Good (3/5)
Carat
Very large (5/5)
Clarity
Good (3/5)
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: Fluorescent
Color description: yG*5/2 (medium yellowish green)
Phenomena: Adularescence Pleochroism Strong
Color phenomena: slp/R*3/2 (light slightly purplish red [pink])
Clarity
Clarity type: Moderately included (Type I)
Transparency: Transparent
Cut
Shape: Cushion
Cut style: Step
Symmetry: Good
Brilliance: Fair
Polish: Good
Size
Width: 15.25 mm
Length: 16.97 mm
Depth: 10.58 mm
Weight: 26.75 cts
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