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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
Page 25 of 52 Back to Top << >>
Bibliographic details
Page title Natural Alexandrite Cushion 21.41 cts
Author David Weinberg
Website title Alexandrite Tsarstone Collectors Guide
Date published 03 July 2010 05:07 UTC
Date accessed 28 May 2018 09:03 UTC
Permanent link http://www.alexandrite.net/viewpage.html?id=ALX-001-00051
AMA style
David Weinberg. "Natural Alexandrite Cushion 21.41 cts". In Alexandrite Tsarstone Collectors Guide. July 03, 2010, 05:07 UTC. Available at: http://www.alexandrite.net/viewpage.html?id=ALX-001-00051. Accessed May 28, 2018.
APA style
"Natural Alexandrite Cushion 21.41 cts". (2010, July 03). In Alexandrite Tsarstone Collectors Guide. Retrieved 09:03, May 28, 2018, from http://www.alexandrite.net/viewpage.html?id=ALX-001-00051.
Bluebook style
"Natural Alexandrite Cushion 21.41 cts", http://www.alexandrite.net/viewpage.html?id=ALX-001-00051 (last visited May 28, 2018).
Bluebook: Harvard JOLT style
See Alexandrite Tsarstone Collectors Guide, "Natural Alexandrite Cushion 21.41 cts", http://www.alexandrite.net/viewpage.html?id=ALX-001-00051 (Extremely rare Alexandrite (Chrysoberyl) Cushion 21.41cts from India (Deobhog area)) (as of May. 28, 2018, 09:03 GMT).
CBE/CSE style
David Weinberg. "Natural Alexandrite Cushion 21.41 cts". In Alexandrite Tsarstone Collectors Guide. 2010 Jul 03, 05:07 UTC.[Internet], Alexandrite Tsarstone Collectors Guide; 2010 Jul 03, 05:07 UTC [cited 2018 May 28]. Available from: http://www.alexandrite.net/viewpage.html?id=ALX-001-00051.
Chicago style
David Weinberg, "Natural Alexandrite Cushion 21.41 cts", http://www.alexandrite.net/viewpage.html?id=ALX-001-00051, (accessed May 28, 2018).
MLA style
"Natural Alexandrite Cushion 21.41 cts". Alexandrite Tsarstone Collectors Guide. 03 Jul 2010, 05:07 UTC. 28 May 2018 http://www.alexandrite.net/viewpage.html?id=ALX-001-00051
MHRA style
David Weinberg, "Natural Alexandrite Cushion 21.41 cts", Alexandrite Tsarstone Collectors Guide, 03 July 2010, 05:07 UTC, http://www.alexandrite.net/viewpage.html?id=ALX-001-00051 [accessed 28 May 2018].
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