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Round|Lab Grown|IGI

12.85ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG581343784

Shape and cutting style on the report: Round brilliant

Certificate IGI LG581343784

Diamond specifications and retailer prices

From $1,986 SGD
£1,223 GBP
As of October 30, 2026
Save $8,645 SGD (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $10,631 SGD at Adiamor · As of October 31, 2026
View at Adiamor

About this 12.85ct lab-grown round diamond

This 12.85ct lab-grown round sits in the over five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG581343784 or 581343784. Listed at 11 retailers as of October 30, 2026, with prices from $1,986 to $10,631, a $8,645 spread on the same certified stone. Adiamor lists it at $10,631. 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

12.85
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG581343784
Dimensions15.16 × 15.26 × 9.19 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
15.16 mm15.26 mm12.85 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG581343784
Side View
Table 57.0%Crown 34°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.4%

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 30
Current: $10,631 SGD|Low: $1,986 SGD|High: $33,380 SGD|Avg: $8,551 SGD
Adiamor
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 6$1,986 SGD
Retailer 8$2,126 SGD
Retailer 13$2,466 SGD
Retailer 9$2,685 SGD
Retailer 12$2,896 SGD
Retailer 11$3,237 SGD
Retailer 7$3,481 SGD
Retailer 10$3,925 SGD
Retailer 2$4,251 SGD
Retailer 3$4,621 SGD
Adiamor$10,631 SGD
Retailer 5$24,520 SGD
Retailer 4$33,380 SGD

4 data points across 13 retailers

11 retailers$1,986 SGD to $10,631 SGD

A
Cheapest Retailer
-
$1,986 SGD
£1,223 GBP
A
Retailer 2
-
$2,126 SGD
$1,663 USD
View
A
Retailer 3
-
$2,466 SGD
$1,929 USD
View
A
Retailer 4
-
$2,685 SGD
$2,100 USD
View
A
Retailer 5
-
$2,896 SGD
HK$17,700 HKD
View
A
Retailer 6
-
$3,237 SGD
$2,532 USD
View
A
Retailer 7
-
$3,481 SGD
£2,144 GBP
View
A
Retailer 8
-
$3,925 SGD
€2,924 EUR
View
A
Retailer 9
-
$4,251 SGD
$3,325 USD
View
B+
Retailer 10
-
$4,621 SGD
$3,615 USD
View
Most Expensive
B
Adiamor
D-82828535 · Oct 31
$10,631 SGD
$8,316 USD
View
10 more retailers have this diamond
Prices start from $1,986 SGDSave up to $8,645 SGD

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
12.85ct Round
$1,986 SGD