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Cushion|Lab Grown|IGI

3.12ct I VS1 Cushion Lab Grown Diamond

ID • I/VS1 • IGI LG557237375

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG557237375

Diamond specifications and retailer prices

From £428 GBP
$573 USD
As of October 29, 2026
Save £2,961 GBP (87%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £3,388 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 3.12ct lab-grown cushion diamond

This 3.12ct lab-grown cushion sits in the three to five carat band, graded I colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG557237375 or 557237375. Listed at 9 retailers as of October 29, 2026, with prices from £428 to £3,388, a £2,961 spread on the same certified stone. Do Amore Diamonds lists it at £3,388. 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

3.12
Carat
I
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG557237375
Dimensions8.55 × 8.47 × 5.73 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.55 mm8.47 mm3.12 ctI / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG557237375
Side View
Table 59.5%Crown 35.5°Girdle: THN-MEDPavilion 40.2°Culet: NoneDepth 67.7%

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: £3,254 GBP|Low: £305 GBP|High: £3,388 GBP|Avg: £1,216 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 6£428 GBP
Retailer 2£554 GBP
Retailer 7£687 GBP
Retailer 8£732 GBP
Retailer 5£734 GBP
Retailer 4£735 GBP
Retailer 3£2,273 GBP
Do Amore Diamonds£3,254 GBP

33 data points across 8 retailers

9 retailers£428 GBP to £3,388 GBP

A
Cheapest Retailer
-
£428 GBP
$573 USD
Final sale: no returns
A
Retailer 2
-
£554 GBP
View
A
Retailer 3
-
£687 GBP
$920 USD
View
A
Retailer 4
-
£732 GBP
$981 USD
View
A
Retailer 5
-
£734 GBP
$984 USD
View
A
Retailer 6
-
£735 GBP
$985 USD
View
B
Retailer 7
-
£2,273 GBP
View
B
Retailer 8
-
£3,254 GBP
$4,360 USD
View
Most Expensive
B
Do Amore Diamonds
27-3908C0E64 · Oct 31
£3,388 GBP
$4,540 USD
View
8 more retailers have this diamond
Prices start from £428 GBPSave up to £2,961 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
3.12ct Cushion
£428 GBP