CaratHunter
Plans
Cushion|Lab Grown|IGI

3.15ct E VVS1 Cushion Lab Grown Diamond

ID • E/VVS1 • IGI LG817629800

Shape and cutting style on the report: Cushion mixed cut

Certificate IGI LG817629800

Diamond specifications and retailer prices

From £521 GBP
$698 USD
As of October 29, 2026
Save £457 GBP (47%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £978 GBP at Loose Grown Diamond · As of October 28, 2026
View at Loose Grown Diamond

About this 3.15ct lab-grown cushion diamond

This 3.15ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG817629800 or 817629800. Listed at 2 retailers as of October 28, 2026, with prices from £521 to £978, a £457 spread on the same certified stone. Loose Grown Diamond lists it at £978. 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

3.15
Carat
E
Colour
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.6°
Pavilion angle51°
OriginLab Grown
Grading LabIGI
CertificateIGI LG817629800
Dimensions10.29 × 6.80 × 4.54 mm
L/W Ratio1.51
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.29 mm6.80 mm3.15 ctE / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG817629800
Side View
Table 64.0%Crown 37.6°Girdle: MED-STKPavilion 51°Culet: LargeDepth 66.8%

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 29
Current: £978 GBP|Low: £521 GBP|High: £2,284 GBP|Avg: £1,414 GBP|+26.6%
Loose Grown Diamond
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 16, 2026
Retailer 2£521 GBP
Retailer 8£907 GBP
Retailer 7£921 GBP
Loose Grown Diamond£978 GBP
Retailer 3£1,440 GBP
Retailer 6£1,695 GBP
Retailer 4£2,031 GBP
Retailer 5£2,034 GBP
Retailer 9£2,284 GBP

5 data points across 9 retailers

2 retailers£521 GBP to £978 GBP

A
Cheapest Retailer
-
£521 GBP
$698 USD
Final sale: no returns
Most Expensive
B+
Loose Grown Diamond
817629800 · Oct 28
£978 GBP
$1,310 USD
View
1 more retailer has this diamond
Prices start from £521 GBPSave up to £457 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
3.15ct Cushion
£521 GBP