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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 HK$42,997 HKD
£4,315 GBP
As of November 2, 2026
Save HK$206,430 HKD (83%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: HK$249,428 HKD at Brilliant Earth · As of November 2, 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 November 2, 2026, with prices from HK$42,997 to HK$249,428, a HK$206,430 spread on the same certified stone. Brilliant Earth lists it at HK$249,428. 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
Colour
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: Nov 2
Current: HK$249,428 HKD|Low: HK$42,997 HKD|High: HK$251,311 HKD|Avg: HK$89,406 HKD|-0.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 2, 2026
Retailer 13HK$42,997 HKD
Retailer 9HK$46,151 HKD
Retailer 17HK$48,371 HKD
Retailer 3HK$52,639 HKD
Retailer 4HK$53,542 HKD
Retailer 16HK$53,550 HKD
Retailer 18HK$58,689 HKD
Retailer 11HK$59,991 HKD
Retailer 2HK$60,839 HKD
Retailer 5HK$63,553 HKD
Retailer 10HK$65,907 HKD
Retailer 14HK$66,731 HKD
Retailer 8HK$78,853 HKD
Retailer 19HK$82,873 HKD
Retailer 12HK$88,448 HKD
Retailer 15HK$102,270 HKD
Retailer 6HK$138,225 HKD
Retailer 7HK$187,415 HKD
Brilliant EarthHK$249,428 HKD

23 data points across 19 retailers

19 retailersHK$42,997 HKD to HK$249,428 HKD

A
Cheapest Retailer
-
HK$42,997 HKD
£4,315 GBP
A
Retailer 2
-
HK$46,151 HKD
$5,882 USD
View
A
Retailer 3
-
HK$48,371 HKD
$6,165 USD
View
A
Retailer 4
-
HK$52,639 HKD
$6,709 USD
View
A
Retailer 5
-
HK$53,542 HKD
$6,824 USD
View
A
Retailer 6
-
HK$53,550 HKD
$6,825 USD
View
A
Retailer 7
-
HK$58,689 HKD
$7,480 USD
View
Final sale: no returns
Retailer 8
-
HK$59,991 HKD
$7,646 USD
View
Price last confirmed 21 days ago
B+
Retailer 9
-
HK$60,839 HKD
$7,754 USD
View
B+
Retailer 10
-
HK$63,553 HKD
$8,100 USD
View
Retailer 11
-
HK$65,907 HKD
$8,400 USD
View
Price last confirmed 8 days ago
B+
Retailer 12
-
HK$66,731 HKD
£6,697 GBP
View
B
Retailer 13
-
HK$78,853 HKD
$10,050 USD
View
B+
Retailer 14
-
HK$82,873 HKD
ZAR 170,635 ZAR
View
B+
Retailer 15
-
HK$88,448 HKD
€10,736 EUR
View
B
Retailer 16
-
HK$102,270 HKD
A$20,053 AUD
View
B
Retailer 17
-
HK$138,225 HKD
$17,617 USD
View
B
Retailer 18
-
HK$187,415 HKD
$23,886 USD
View
Most Expensive
B
Brilliant Earth
21726945A · Nov 2
HK$249,428 HKD
$31,790 USD
View
18 more retailers have this diamond
Prices start from HK$42,997 HKDSave up to HK$206,430 HKD

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
HK$42,997 HKD