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Cushion|Lab Grown|IGI

0.51ct E VVS1 Cushion Lab Grown Diamond

GD • E/VVS1 • IGI LG691513964

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG691513964

Diamond specifications and retailer prices

From £110 GBP
$148 USD
As of October 30, 2026
Save £365 GBP (77%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £475 GBP at Riddles Jewelry · As of October 29, 2026
View at Riddles Jewelry

About this 0.51ct lab-grown cushion diamond

This 0.51ct lab-grown cushion sits in the half to three-quarter carat band, graded E colour (colourless) and VVS1 clarity (very-very-slightly-included), with a standard cut grade and certified by IGI LG691513964 or 691513964. Listed at 6 retailers as of October 29, 2026, with prices from £110 to £475, a £365 spread on the same certified stone. Riddles Jewelry lists it at £475. 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

0.51
Carat
E
Colour
VVS1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle35°
OriginLab Grown
Grading LabIGI
CertificateIGI LG691513964
Dimensions5.56 × 4.04 × 2.77 mm
L/W Ratio1.38
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.56 mm4.04 mm0.51 ctE / VVS1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG691513964
Side View
Table 61.0%Crown 35.2°Girdle: MED-THKPavilion 35°Culet: NoneDepth 68.6%

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: Oct 30
Current: £403 GBP|Low: £83 GBP|High: £925 GBP|Avg: £382 GBP|+8.1%
Retailer 1
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Retailer 4
Retailer 5
Retailer 6
Retailer 7
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Retailer 9
Retailer 10
Retailer 11
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Retailer 13
Retailer 14
Riddles Jewelry
October 19, 2026
Retailer 10£110 GBP
Retailer 13£201 GBP
Retailer 9£203 GBP
Retailer 8£207 GBP
Retailer 7£245 GBP
Retailer 5£274 GBP
Retailer 6£370 GBP
Retailer 3£372 GBP
Retailer 1£403 GBP
Retailer 11£469 GBP
Riddles Jewelry£475 GBP
Retailer 12£513 GBP
Retailer 4£516 GBP
Retailer 2£532 GBP
Retailer 14£925 GBP

10 data points across 15 retailers

6 retailers£110 GBP to £475 GBP

A
Cheapest Retailer
-
£110 GBP
$148 USD
Final sale: no returns
B+
Retailer 2
-
£203 GBP
$272 USD
View
B+
Retailer 3
-
£207 GBP
$278 USD
View
B+
Retailer 4
-
£245 GBP
$328 USD
View
B
Retailer 5
-
£403 GBP
CA$750 CAD
View
Most Expensive
B
Riddles Jewelry
1966220238 · Oct 29
£475 GBP
$637 USD
View
5 more retailers have this diamond
Prices start from £110 GBPSave up to £365 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
0.51ct Cushion
£110 GBP