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Round|Lab Grown|IGI

18.31ct G VS1 Round Lab Grown Diamond

ID • G/VS1 • IGI LG779646467

Shape and cutting style on the report: Round brilliant

Certificate IGI LG779646467

Diamond specifications and retailer prices

From $8,989 USD
As of October 30, 2026
Save $21,551 USD (71%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $30,540 USD at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 18.31ct lab-grown round diamond

This 18.31ct 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 LG779646467 or 779646467. Listed at 7 retailers as of October 30, 2026, with prices from $8,989 to $30,540, a $21,551 spread on the same certified stone. Taylor and Hart lists it at $30,540. 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

18.31
Carat
G
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG779646467
Dimensions17.13 × 17.19 × 10.19 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
17.13 mm17.19 mm18.31 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG779646467
Side View
Table 58.0%Crown 33.3°Girdle: MediumPavilion 40.3°Culet: NoneDepth 59.4%

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: $15,435 USD|Low: $8,708 USD|High: $30,540 USD|Avg: $15,528 USD|-4.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Taylor and Hart
October 31, 2026
Retailer 4$8,989 USD
Retailer 3$9,388 USD
Retailer 6$9,766 USD
Retailer 2$11,351 USD
Retailer 1$15,435 USD
Retailer 5$21,996 USD
Taylor and Hart$30,540 USD

40 data points across 7 retailers

7 retailers$8,989 USD to $30,540 USD

A
Cheapest Retailer
-
$8,989 USD
A
Retailer 2
-
$9,388 USD
View
B+
Retailer 3
-
$9,766 USD
HK$76,300 HKD
View
B+
Retailer 4
-
$11,351 USD
£8,938 GBP
View
B+
Retailer 5
-
$15,435 USD
€14,700 EUR
View
B
Retailer 6
-
$21,996 USD
View
Most Expensive
B
Taylor and Hart
TLX10KG · Oct 31
$30,540 USD
View
6 more retailers have this diamond
Prices start from $8,989 USDSave up to $21,551 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
18.31ct Round
$8,989 USD