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Round|Lab Grown|IGI

16.51ct G VS1 Round Lab Grown Diamond

EX • G/VS1 • IGI LG837681313

Shape and cutting style on the report: Round brilliant

Certificate IGI LG837681313

Diamond specifications and retailer prices

From $5,497 USD
£4,328 GBP
As of October 30, 2026
Save $26,293 USD (83%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $31,790 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 16.51ct lab-grown round diamond

This 16.51ct lab-grown round sits in the over five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG837681313 or 837681313. Listed at 19 retailers as of October 30, 2026, with prices from $5,497 to $31,790, a $26,293 spread on the same certified stone. Brilliant Earth lists it at $31,790. 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

16.51
Carat
G
Color
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837681313
Dimensions16.08 × 16.16 × 10.14 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.08 mm16.16 mm16.51 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837681313
Side View
Table 60.0%Crown 36.5°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 62.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $31,790 USD|Low: $5,497 USD|High: $32,030 USD|Avg: $11,418 USD|-0.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 11
Retailer 12
Retailer 13
Retailer 14
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Retailer 19
November 1, 2026
Retailer 17$5,497 USD
Retailer 8$5,882 USD
Retailer 14$6,165 USD
Retailer 19$6,709 USD
Retailer 3$6,824 USD
Retailer 13$6,825 USD
Retailer 16$7,480 USD
Retailer 11$7,646 USD
Retailer 15$7,665 USD
Retailer 4$8,100 USD
Retailer 9$8,400 USD
Retailer 2$8,505 USD
Retailer 7$10,050 USD
Retailer 18$10,562 USD
Retailer 12$11,227 USD
Retailer 10$14,472 USD
Retailer 5$17,617 USD
Retailer 6$23,886 USD
Brilliant Earth$31,790 USD

24 data points across 19 retailers

19 retailers$5,497 USD to $31,790 USD

A
Cheapest Retailer
-
$5,497 USD
£4,328 GBP
A
Retailer 2
-
$5,882 USD
View
A
Retailer 3
-
$6,165 USD
View
A
Retailer 4
-
$6,709 USD
View
A
Retailer 5
-
$6,824 USD
View
A
Retailer 6
-
$6,825 USD
View
A
Retailer 7
-
$7,480 USD
View
Final sale: no returns
Retailer 8
-
$7,646 USD
View
Price last confirmed 19 days ago
A
Retailer 9
-
$7,665 USD
View
B+
Retailer 10
-
$8,100 USD
View
Retailer 11
-
$8,400 USD
View
Price last confirmed 7 days ago
B+
Retailer 12
-
$8,505 USD
£6,697 GBP
View
B
Retailer 13
-
$10,050 USD
View
B+
Retailer 14
-
$10,562 USD
ZAR 170,635 ZAR
View
B+
Retailer 15
-
$11,227 USD
€10,692 EUR
View
Retailer 16
-
$14,472 USD
A$22,265 AUD
View
Price last confirmed 9 days ago
B
Retailer 17
-
$17,617 USD
View
B
Retailer 18
-
$23,886 USD
View
Most Expensive
B
Brilliant Earth
21726945A · Oct 31
$31,790 USD
View
18 more retailers have this diamond
Prices start from $5,497 USDSave up to $26,293 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
16.51ct Round
$5,497 USD