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Alexandrite

Tsarstone collectors guide

Strong Color Change Alexandrite Cushion

Bluish green in daylight and purple red under incandescent light, the color change is exceptionally strong and attractive. The change is 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 and the price is right. $3000 /ct. is a steal for an alexandrite this large!

Strong Color Change Alexandrite Cushion
Natural Alexandrite Cushion 21.41 cts Natural Alexandrite Cushion 21.41 cts

Grade Score 10 / 10

Color
Exceptional (5/5)
Cut
Exceptional (5/5)
Carat
Very large (5/5)
Clarity
Exceptional (5/5)
Rarity
Extremely rare (5/5)

Price information

Availability information

  • Offered through Multicolour.com
  • Usually ships within 24 hours
  • Source: Multicolour.com
  • Multicolour Gems Co., Ltd
Detail identification and grading report
Identification
Type: Natural
Species: Chrysoberyl
Variety: Alexandrite
Origin: Deobhog area, Raipur, Chhattisgarh, India
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*5/4 (medium very strongly bluish green)
Phenomena: Pleochroism Change of color (Alexandrite effect) Strong
Color phenomena: rP 5/3 (medium reddish purple)
Clarity
Clarity type: Moderately included (Type I)
Transparency: Transparent
Cut
Shape: Cushion
Cut style: Step
Symmetry: Exceptional
Brilliance: Exceptional
Polish: Exceptional
Size
Width: 14.50 mm
Length: 15.50 mm
Depth: 10.50 mm
Weight: 21.41 cts
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