Radiant|Lab Grown|IGI

21.51ct J VS1 Radiant Lab Grown Diamond

ID • J/VS1 • IGI LG802604946

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG802604946

Diamond specifications and retailer prices

From €6,521 EUR
£5,737 GBP
As of November 1, 2026
Save €21,430 EUR (77%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €27,952 EUR at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 21.51ct lab-grown radiant diamond

This 21.51ct lab-grown radiant sits in the over five carat band, graded J colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG802604946 or 802604946. Listed at 13 retailers as of October 31, 2026, with prices from €6,521 to €27,952, a €21,430 spread on the same certified stone. Taylor and Hart lists it at €27,952. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

21.51
Carat
J
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle48.1°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG802604946
Dimensions20.01 × 13.41 × 9.16 mm
L/W Ratio1.49
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
20.01 mm13.41 mm21.51 ctJ / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG802604946
Side View
Table 66.0%Crown 48.1°Girdle: ThickPavilion 39.4°Culet: NoneDepth 68.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: €6,521 EUR|Low: €6,046 EUR|High: €27,952 EUR|Avg: €11,247 EUR|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Taylor and Hart
November 1, 2026
Retailer 1€6,521 EUR
Retailer 8€7,560 EUR
Retailer 10€7,862 EUR
Retailer 3€8,414 EUR
Retailer 2€8,466 EUR
Retailer 7€8,769 EUR
Retailer 11€8,769 EUR
Retailer 5€8,772 EUR
Retailer 9€9,755 EUR
Retailer 6€9,862 EUR
Retailer 12€10,146 EUR
Retailer 4€18,784 EUR
Taylor and Hart€27,952 EUR

39 data points across 13 retailers

13 retailers€6,521 EUR to €27,952 EUR

A
Cheapest Retailer
-
€6,521 EUR
£5,737 GBP
B+
Retailer 2
-
€7,560 EUR
$8,446 USD
View
B+
Retailer 3
-
€7,862 EUR
$8,783 USD
View
B+
Retailer 4
-
€8,414 EUR
$9,400 USD
View
B+
Retailer 5
-
€8,466 EUR
$9,458 USD
View
Final sale: no returns
Retailer 6
-
€8,769 EUR
$9,797 USD
View
Price last confirmed 19 days ago
B+
Retailer 7
-
€8,769 EUR
$9,797 USD
View
B+
Retailer 8
-
€8,772 EUR
$9,800 USD
View
B+
Retailer 9
-
€9,755 EUR
$10,898 USD
View
B+
Retailer 10
-
€9,862 EUR
$11,018 USD
View
B+
Retailer 11
-
€10,146 EUR
$11,335 USD
View
B+
Retailer 12
-
€18,784 EUR
$20,986 USD
View
Most Expensive
B
Taylor and Hart
CLBJTCY · Oct 31
€27,952 EUR
$31,228 USD
View
12 more retailers have this diamond
Prices start from €6,521 EURSave up to €21,430 EUR

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.

A
21.51ct Radiant
€6,521 EUR