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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
Page 69 of 98 Back to Top << >>
Bibliographic details
Page title Natural Alexandrite Cushion 26.75 cts
Author David Weinberg
Website title Alexandrite Tsarstone Collectors Guide
Date published 03 July 2010 05:05 UTC
Date accessed 25 October 2014 04:34 UTC
Permanent link http://www.alexandrite.net/viewpage.html?id=ALX-001-00001
AMA style
David Weinberg. "Natural Alexandrite Cushion 26.75 cts". In Alexandrite Tsarstone Collectors Guide. July 03, 2010, 05:05 UTC. Available at: http://www.alexandrite.net/viewpage.html?id=ALX-001-00001. Accessed October 25, 2014.
APA style
"Natural Alexandrite Cushion 26.75 cts". (2010, July 03). In Alexandrite Tsarstone Collectors Guide. Retrieved 04:34, October 25, 2014, from http://www.alexandrite.net/viewpage.html?id=ALX-001-00001.
Bluebook style
"Natural Alexandrite Cushion 26.75 cts", http://www.alexandrite.net/viewpage.html?id=ALX-001-00001 (last visited October 25, 2014).
Bluebook: Harvard JOLT style
See Alexandrite Tsarstone Collectors Guide, "Natural Alexandrite Cushion 26.75 cts", http://www.alexandrite.net/viewpage.html?id=ALX-001-00001 (Extremely rare Alexandrite (Chrysoberyl) Cushion 26.75cts from Tanzania (Tunduru)) (as of Oct. 25, 2014, 04:34 GMT).
CBE/CSE style
David Weinberg. "Natural Alexandrite Cushion 26.75 cts". In Alexandrite Tsarstone Collectors Guide. 2010 Jul 03, 05:05 UTC.[Internet], Alexandrite Tsarstone Collectors Guide; 2010 Jul 03, 05:05 UTC [cited 2014 Oct 25]. Available from: http://www.alexandrite.net/viewpage.html?id=ALX-001-00001.
Chicago style
David Weinberg, "Natural Alexandrite Cushion 26.75 cts", http://www.alexandrite.net/viewpage.html?id=ALX-001-00001, (accessed October 25, 2014).
MLA style
"Natural Alexandrite Cushion 26.75 cts". Alexandrite Tsarstone Collectors Guide. 03 Jul 2010, 05:05 UTC. 25 Oct 2014 http://www.alexandrite.net/viewpage.html?id=ALX-001-00001
MHRA style
David Weinberg, "Natural Alexandrite Cushion 26.75 cts", Alexandrite Tsarstone Collectors Guide, 03 July 2010, 05:05 UTC, http://www.alexandrite.net/viewpage.html?id=ALX-001-00001 [accessed 25 October 2014].
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