Certified Strong Change Alexandrite 21.23cts
Dark blue green in daylight and purple- red under incandescent light, the color change is strong and attractive. Although the clarity is not that good, alexandrites this large are extremely rare. An antique setting might be the best way to set this stone. The cutting and proportions are quite good.
  
Grade Score 7 / 10
Color Very good (4/5) Cut Fair (2/5) Carat Very large (5/5) Clarity Fair (2/5) Rarity Extremely rare (5/5)
Price information
Web: $ 25501.00
RRP: $ 38251.50
Source: Multicolour.com
Availability information
Private collection
Not available for sale
Source: Multicolour.com

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:	GB/BG*6/2 (medium dark green blue or blue green)	
Phenomena:	Change of color (Alexandrite effect) Pleochroism Strong	
Color phenomena:	RP/PR 5/3 (medium red-purple [pink])	
Clarity		
Clarity type:	Severely included (Type I)	
Transparency:	Transparent	
Cut		
Shape:	Cushion	
Cut style:	Step	
Symmetry:	Fair	
Brilliance:	Poor	
Polish:	Good	
Size		
Width:	11.90 mm	
Length:	16.02 mm	
Depth:	11.33 mm	
Weight:	21.23 cts