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Alexandrite

Tsarstone collectors guide

Certified Fine Natural Alexandrite 4.16cts.

Dark very slightly bluish green in daylight, and medium dark red-purple under incandescent light, the color change is strong and attractive. The cut, polish, proportions and clarity are excellent.

Certified Fine Natural Alexandrite 4.16cts.
Natural Alexandrite Oval 4.16 cts Natural Alexandrite Oval 4.16 cts

Grade Score 7 / 10

Color
Good (3/5)
Cut
Fair (2/5)
Carat
Large (4/5)
Clarity
Exceptional (5/5)
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: vslbG*7/2 (dark very slightly bluish green)
Phenomena: Change of color (Alexandrite effect) Pleochroism Strong
Color phenomena: RP/PR 6/3 (medium dark red-purple)
Clarity
Clarity type: Eye clean (Type I)
Transparency: Transparent
Cut
Shape: Oval
Cut style: Step
Symmetry: Good
Brilliance: Fair
Polish: Exceptional
Size
Width: 7.88 mm
Length: 10.44 mm
Depth: 5.90 mm
Weight: 4.16 cts
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Bibliographic details
Page title Natural Alexandrite Oval 4.16 cts
Author David Weinberg
Website title Alexandrite Tsarstone Collectors Guide
Date published 03 July 2010 05:06 UTC
Date accessed 08 November 2025 18:44 UTC
Permanent link http://www.alexandrite.net/viewpage.html?id=ALX-001-00015
AMA style
David Weinberg. "Natural Alexandrite Oval 4.16 cts". In Alexandrite Tsarstone Collectors Guide. July 03, 2010, 05:06 UTC. Available at: http://www.alexandrite.net/viewpage.html?id=ALX-001-00015. Accessed November 08, 2025.
APA style
"Natural Alexandrite Oval 4.16 cts". (2010, July 03). In Alexandrite Tsarstone Collectors Guide. Retrieved 18:44, November 08, 2025, from http://www.alexandrite.net/viewpage.html?id=ALX-001-00015.
Bluebook style
"Natural Alexandrite Oval 4.16 cts", http://www.alexandrite.net/viewpage.html?id=ALX-001-00015 (last visited November 08, 2025).
Bluebook: Harvard JOLT style
See Alexandrite Tsarstone Collectors Guide, "Natural Alexandrite Oval 4.16 cts", http://www.alexandrite.net/viewpage.html?id=ALX-001-00015 (Extremely rare Alexandrite (Chrysoberyl) Oval 4.16cts from Tanzania (Tunduru)) (as of Nov. 08, 2025, 18:44 GMT).
CBE/CSE style
David Weinberg. "Natural Alexandrite Oval 4.16 cts". In Alexandrite Tsarstone Collectors Guide. 2010 Jul 03, 05:06 UTC.[Internet], Alexandrite Tsarstone Collectors Guide; 2010 Jul 03, 05:06 UTC [cited 2025 Nov 08]. Available from: http://www.alexandrite.net/viewpage.html?id=ALX-001-00015.
Chicago style
David Weinberg, "Natural Alexandrite Oval 4.16 cts", http://www.alexandrite.net/viewpage.html?id=ALX-001-00015, (accessed November 08, 2025).
MLA style
"Natural Alexandrite Oval 4.16 cts". Alexandrite Tsarstone Collectors Guide. 03 Jul 2010, 05:06 UTC. 08 Nov 2025 http://www.alexandrite.net/viewpage.html?id=ALX-001-00015
MHRA style
David Weinberg, "Natural Alexandrite Oval 4.16 cts", Alexandrite Tsarstone Collectors Guide, 03 July 2010, 05:06 UTC, http://www.alexandrite.net/viewpage.html?id=ALX-001-00015 [accessed 08 November 2025].
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