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Round|Lab Grown|IGI

3.12ct K SI1 Round Lab Grown Diamond

EX • K/SI1 • IGI LG485136526

Shape and cutting style on the report: Round brilliant

Certificate IGI LG485136526

Diamond specifications and retailer prices

From $4,767 USD
As of November 5, 2026
Save $6,653 USD (58%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $11,420 USD at MOH London · As of November 5, 2026
View at MOH London

About this 3.12ct lab-grown round diamond

This 3.12ct lab-grown round sits in the three to five carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG485136526 or 485136526. Listed at 9 retailers as of November 5, 2026, with prices from $4,767 to $11,420, a $6,653 spread on the same certified stone. MOH London lists it at $11,420. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

3.12
Carat
K
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG485136526
Dimensions9.36 × 9.30 × 5.73 mm
L/W Ratio1.01
Girdle conditionFaceted
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
9.36 mm9.30 mm3.12 ctK / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG485136526
Side View
Table 60.5%Crown 35.8°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.3%

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: Nov 5
Current: $11,420 USD|Low: $4,767 USD|High: $11,604 USD|Avg: $7,615 USD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 5, 2026
Retailer 4$4,767 USD
Retailer 2$5,560 USD
Retailer 6$6,128 USD
Retailer 3$7,063 USD
Retailer 5$8,551 USD
MOH London$11,420 USD

18 data points across 6 retailers

9 retailers$4,767 USD to $11,420 USD

A
Cheapest Retailer
-
$4,767 USD
A
Retailer 2
-
$4,996 USD
View
B+
Retailer 3
-
$5,530 USD
View
Retailer 4
-
$5,530 USD
View
Price last confirmed 25 days ago
B+
Retailer 5
-
$5,560 USD
View
B
Retailer 6
-
$6,910 USD
View
B
Retailer 7
-
$7,063 USD
View
B
Retailer 8
-
$8,551 USD
View
Most Expensive
B
MOH London
LG485136526 · Nov 5
$11,420 USD
£8,992 GBP
View
8 more retailers have this diamond
Prices start from $4,767 USDSave up to $6,653 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.

A
3.12ct Round
$4,767 USD