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Cushion|Lab Grown|GCAL

3.12ct I SI1 Cushion Lab Grown Diamond

VG • I/SI1 • GCAL 302750364

Certificate GCAL 302750364

Diamond specifications and retailer prices

From $932 USD
As of October 30, 2026
Save $2,125 USD (70%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $3,057 USD at MOH London · As of October 29, 2026
View at MOH London

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 SI1 clarity (slightly-included), with a very-good cut grade and certified by GCAL 302750364. Listed at 3 retailers as of October 29, 2026, with prices from $932 to $3,057, a $2,125 spread on the same certified stone. MOH London lists it at $3,057. 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

3.12
Carat
I
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginLab Grown
Grading LabGCAL
CertificateGCAL 302750364
Dimensions8.91 × 8.25 × 5.57 mm
L/W Ratio1.08
Top View
8.91 mm8.25 mm3.12 ctI / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGCAL 302750364
Side View
Table 63.0%CrownGirdlePavilionCulet: NoneDepth 67.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $3,057 USD|Low: $932 USD|High: $3,077 USD|Avg: $1,657 USD|-0.5%
MOH London
Retailer 2
Retailer 3
October 29, 2026
Retailer 3$932 USD
Retailer 2$984 USD
MOH London$3,057 USD

6 data points across 3 retailers

3 retailers$932 USD to $3,057 USD

B+
Cheapest Retailer
-
$932 USD
B+
Retailer 2
-
$984 USD
View
Most Expensive
B
MOH London
LG302750364 · Oct 29
$3,057 USD
£2,407 GBP
View
2 more retailers have this diamond
Prices start from $932 USDSave up to $2,125 USD

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.

B+
3.12ct Cushion
$932 USD