Emerald|Lab Grown|IGI

20.57ct F VS1 Emerald Lab Grown Diamond

VG • F/VS1 • IGI LG826662775

Shape and cutting style on the report: Emerald cut

Certificate IGI LG826662775

Diamond specifications and retailer prices

From $12,485 USD
As of October 31, 2026
Save $9,794 USD (44%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $40,565 USD at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 20.57ct lab-grown emerald diamond

This 20.57ct lab-grown emerald sits in the over five carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG826662775 or 826662775. Listed at 8 retailers as of October 31, 2026, with a 78% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

20.57
Carat
F
Color
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle39.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG826662775
Dimensions19.48 × 12.92 × 8.13 mm
L/W Ratio1.51
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
19.48 mm12.92 mm20.57 ctF / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG826662775
Side View
Table 66.0%Crown 33.9°Girdle: MediumPavilion 39.6°Culet: LargeDepth 62.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 31
Current: $48,850 USD|Low: $8,810 USD|High: $58,900 USD|Avg: $21,515 USD|-17.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Taylor and Hart
October 31, 2026
Retailer 6$8,810 USD
Retailer 3$12,485 USD
Retailer 5$12,881 USD
Retailer 4$13,631 USD
Retailer 2$16,328 USD
Retailer 7$22,279 USD
Taylor and Hart$40,565 USD
Retailer 1$48,850 USD

27 data points across 8 retailers

8 retailers$12,485 USD to $22,279 USD

Retailer 1
-
$8,810 USD
Price last confirmed 10 days ago
B
Retailer 2
-
$12,485 USD
View
B
Retailer 3
-
$12,881 USD
View
B
Retailer 4
-
$13,631 USD
View
B
Retailer 5
-
$16,328 USD
£12,856 GBP
View
B
Retailer 6
-
$22,279 USD
View
Most Expensive
Taylor and Hart
XKAONNY · Oct 31
$40,565 USD
View
Price under review
6 more retailers have this diamond
Prices start from $12,485 USDSave up to $9,794 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B
20.57ct Emerald
$12,485 USD