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Cushion|Lab Grown|IGI

3.51ct D VS2 Cushion Lab Grown Diamond

ID • D/VS2 • IGI LG821699152

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG821699152

Diamond specifications and retailer prices

From £697 GBP
€884 EUR
As of October 29, 2026
Save £1,226 GBP (64%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,234 GBP at Rare Carat · As of September 9, 2026
View at Rare Carat

About this 3.51ct lab-grown cushion diamond

This 3.51ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG821699152 or 821699152. Listed at 11 retailers as of October 29, 2026, with a 176% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

3.51
Carat
D
Colour
VS2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle26.6°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821699152
Dimensions11.44 × 7.82 × 5.03 mm
L/W Ratio1.46
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.44 mm7.82 mm3.51 ctD / VS2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821699152
Side View
Table 68.0%Crown 26.6°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 64.3%

Caratlytics Score

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

Price History

Last verified: Oct 29
Current: £2,234 GBP|Low: £463 GBP|High: £2,234 GBP|Avg: £1,335 GBP
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 9£463 GBP
Retailer 3£697 GBP
Retailer 5£714 GBP
Retailer 2£762 GBP
Retailer 6£1,123 GBP
Retailer 7£1,493 GBP
Retailer 8£1,738 GBP
Retailer 4£1,923 GBP
Retailer 10£1,938 GBP
Rare Carat£2,234 GBP

41 data points across 10 retailers

11 retailers£697 GBP to £1,923 GBP

Retailer 1
-
£463 GBP
$617 USD
Price last confirmed 13 days ago
A
Retailer 2
-
£697 GBP
€884 EUR
View
B+
Retailer 3
-
£714 GBP
$951 USD
View
A
Retailer 4
-
£762 GBP
View
A
Retailer 5
-
£1,123 GBP
$1,496 USD
View
B+
Retailer 6
-
£1,493 GBP
$1,988 USD
View
B+
Retailer 7
-
£1,714 GBP
$2,282 USD
View
B+
Retailer 8
-
£1,738 GBP
$2,315 USD
View
B+
Retailer 9
-
£1,923 GBP
View
Retailer 10
-
£1,938 GBP
A$3,971 AUD
View
Price last confirmed 25 days ago
Most Expensive
Rare Carat
30R821699152 · Sep 9
£2,234 GBP
$2,974 USD
View
Price last confirmed 51 days ago
10 more retailers have this diamond
Prices start from £697 GBPSave up to £1,226 GBP

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
3.51ct Cushion
£697 GBP