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Round|Lab Grown|IGI

15.32ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG587311321

Shape and cutting style on the report: Round brilliant

Certificate IGI LG587311321

Diamond specifications and retailer prices

From $5,276 USD
£4,154 GBP
As of November 1, 2026
Save $15,744 USD (75%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $21,020 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 15.32ct lab-grown round diamond

This 15.32ct 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 LG587311321 or 587311321. Listed at 8 retailers as of October 31, 2026, with prices from $5,276 to $21,020, a $15,744 spread on the same certified stone. Brilliant Earth lists it at $21,020. 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

15.32
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG587311321
Dimensions16.05 × 16.15 × 9.77 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
16.05 mm16.15 mm15.32 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG587311321
Side View
Table 56.0%Crown 33.9°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.6%

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: Nov 1
Current: $21,020 USD|Low: $5,274 USD|High: $49,868 USD|Avg: $13,931 USD|-3.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 2$5,276 USD
Retailer 7$6,342 USD
Retailer 10$7,846 USD
Retailer 5$7,948 USD
Retailer 4$7,950 USD
Retailer 6$10,142 USD
Retailer 8$10,399 USD
Retailer 11$13,046 USD
Retailer 9$13,062 USD
Brilliant Earth$21,020 USD
Retailer 3$49,868 USD

35 data points across 11 retailers

8 retailers$5,276 USD to $21,020 USD

B+
Cheapest Retailer
-
$5,276 USD
£4,154 GBP
B+
Retailer 2
-
$6,342 USD
View
Final sale: no returns
B
Retailer 3
-
$7,846 USD
HK$61,300 HKD
View
B
Retailer 4
-
$7,948 USD
View
B
Retailer 5
-
$7,950 USD
View
B
Retailer 6
-
$10,142 USD
View
B
Retailer 7
-
$13,062 USD
View
Most Expensive
B
Brilliant Earth
8428522A · Oct 31
$21,020 USD
View
7 more retailers have this diamond
Prices start from $5,276 USDSave up to $15,744 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+
15.32ct Round
$5,276 USD