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Round|Lab Grown|IGI

18.51ct G VS1 Round Lab Grown Diamond

ID • G/VS1 • IGI LG786667076

Shape and cutting style on the report: Round brilliant

Certificate IGI LG786667076

Diamond specifications and retailer prices

From HK$59,093 HKD
£5,930 GBP
As of November 2, 2026
Save HK$223,759 HKD (79%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: HK$282,852 HKD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 18.51ct lab-grown round diamond

This 18.51ct 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 LG786667076 or 786667076. Listed at 18 retailers as of November 2, 2026, with prices from HK$59,093 to HK$282,852, a HK$223,759 spread on the same certified stone. Brilliant Earth lists it at HK$282,852. 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

18.51
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786667076
Dimensions17.01 × 17.07 × 10.36 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
17.01 mm17.07 mm18.51 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786667076
Side View
Table 59.0%Crown 33.8°Girdle: MediumPavilion 40.9°Culet: NoneDepth 60.8%

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$282,852 HKD|Low: HK$59,075 HKD|High: HK$290,933 HKD|Avg: HK$108,232 HKD|-2.8%
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
November 2, 2026
Retailer 11HK$59,093 HKD
Retailer 18HK$63,428 HKD
Retailer 9HK$65,970 HKD
Retailer 7HK$69,462 HKD
Retailer 5HK$73,581 HKD
Retailer 10HK$73,581 HKD
Retailer 15HK$73,596 HKD
Retailer 16HK$77,127 HKD
Retailer 17HK$81,851 HKD
Retailer 6HK$82,753 HKD
Retailer 4HK$85,169 HKD
Retailer 12HK$90,387 HKD
Retailer 14HK$113,902 HKD
Retailer 2HK$122,769 HKD
Retailer 13HK$139,872 HKD
Retailer 3HK$175,690 HKD
Retailer 8HK$238,302 HKD
Brilliant EarthHK$282,852 HKD

35 data points across 18 retailers

18 retailersHK$59,093 HKD to HK$282,852 HKD

A
Cheapest Retailer
-
HK$59,093 HKD
£5,930 GBP
A
Retailer 2
-
HK$63,428 HKD
$8,084 USD
View
A
Retailer 3
-
HK$65,970 HKD
$8,408 USD
View
B+
Retailer 4
-
HK$69,462 HKD
$8,853 USD
View
Retailer 5
-
HK$73,581 HKD
$9,378 USD
View
Price last confirmed 21 days ago
B+
Retailer 6
-
HK$73,581 HKD
$9,378 USD
View
B+
Retailer 7
-
HK$73,596 HKD
$9,380 USD
View
Retailer 8
-
HK$77,127 HKD
$9,830 USD
View
Price last confirmed 15 days ago
B+
Retailer 9
-
HK$81,851 HKD
$10,432 USD
View
B+
Retailer 10
-
HK$82,753 HKD
$10,547 USD
View
B+
Retailer 11
-
HK$85,169 HKD
$10,855 USD
View
B+
Retailer 12
-
HK$90,387 HKD
£9,071 GBP
View
B+
Retailer 13
-
HK$113,902 HKD
ZAR 234,524 ZAR
View
B
Retailer 14
-
HK$122,769 HKD
€14,902 EUR
View
B
Retailer 15
-
HK$139,872 HKD
A$27,426 AUD
View
B
Retailer 16
-
HK$175,690 HKD
$22,392 USD
View
B
Retailer 17
-
HK$238,302 HKD
$30,372 USD
View
Most Expensive
B
Brilliant Earth
18294822A · Nov 2
HK$282,852 HKD
$36,050 USD
View
17 more retailers have this diamond
Prices start from HK$59,093 HKDSave up to HK$223,759 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
18.51ct Round
HK$59,093 HKD