Radiant|Lab Grown|IGI

18.07ct G VS1 Radiant Lab Grown Diamond

ID • G/VS1 • IGI LG830673978

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG830673978

Diamond specifications and retailer prices

From $7,730 USD
As of October 31, 2026
Save $21,620 USD (74%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $29,350 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 18.07ct lab-grown radiant diamond

This 18.07ct lab-grown radiant 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 LG830673978 or 830673978. Listed at 10 retailers as of October 31, 2026, with prices from $7,730 to $29,350, a $21,620 spread on the same certified stone. Brilliant Earth lists it at $29,350. 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

18.07
Carat
G
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle49.9°
Pavilion angle32.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830673978
Dimensions17.72 × 12.54 × 8.47 mm
L/W Ratio1.41
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
17.72 mm12.54 mm18.07 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830673978
Side View
Table 65.0%Crown 49.9°Girdle: Slightly ThickPavilion 32.7°Culet: NoneDepth 67.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $29,350 USD|Low: $7,730 USD|High: $30,620 USD|Avg: $15,776 USD|-4.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 8$7,730 USD
Retailer 7$8,381 USD
Retailer 3$9,755 USD
Retailer 5$11,475 USD
Retailer 4$12,014 USD
Retailer 2$14,187 USD
Retailer 6$14,856 USD
Retailer 9$19,765 USD
Retailer 10$26,644 USD
Brilliant Earth$29,350 USD

42 data points across 10 retailers

10 retailers$7,730 USD to $29,350 USD

B+
Cheapest Retailer
-
$7,730 USD
B+
Retailer 2
-
$8,381 USD
View
B+
Retailer 3
-
$9,755 USD
£7,681 GBP
View
B
Retailer 4
-
$11,475 USD
View
B+
Retailer 5
-
$12,014 USD
ZAR 194,084 ZAR
View
B
Retailer 6
-
$14,187 USD
€13,511 EUR
View
Retailer 7
-
$14,856 USD
A$22,856 AUD
View
Price last confirmed 9 days ago
B
Retailer 8
-
$19,765 USD
View
B
Retailer 9
-
$26,644 USD
View
Most Expensive
B
Brilliant Earth
21633058A · Oct 31
$29,350 USD
View
9 more retailers have this diamond
Prices start from $7,730 USDSave up to $21,620 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+
18.07ct Radiant
$7,730 USD