CaratHunter
Plans
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 $7,555 USD
£5,949 GBP
As of October 30, 2026
Save $28,495 USD (79%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $36,050 USD at Brilliant Earth · As of October 31, 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 October 30, 2026, with prices from $7,555 to $36,050, a $28,495 spread on the same certified stone. Brilliant Earth lists it at $36,050. 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
Color
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: Oct 30
Current: $36,050 USD|Low: $7,529 USD|High: $37,080 USD|Avg: $14,201 USD|-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
October 31, 2026
Retailer 11$7,555 USD
Retailer 18$8,084 USD
Retailer 9$8,408 USD
Retailer 7$8,853 USD
Retailer 5$9,378 USD
Retailer 10$9,378 USD
Retailer 14$9,380 USD
Retailer 16$9,830 USD
Retailer 17$10,432 USD
Retailer 6$10,547 USD
Retailer 4$10,855 USD
Retailer 12$11,520 USD
Retailer 13$14,517 USD
Retailer 2$15,584 USD
Retailer 15$17,857 USD
Retailer 3$22,392 USD
Retailer 8$30,372 USD
Brilliant Earth$36,050 USD

34 data points across 18 retailers

18 retailers$7,555 USD to $36,050 USD

A
Cheapest Retailer
-
$7,555 USD
£5,949 GBP
A
Retailer 2
-
$8,084 USD
View
A
Retailer 3
-
$8,408 USD
View
A
Retailer 4
-
$8,853 USD
View
Retailer 5
-
$9,378 USD
View
Price last confirmed 19 days ago
B+
Retailer 6
-
$9,378 USD
View
B+
Retailer 7
-
$9,380 USD
View
Retailer 8
-
$9,830 USD
View
Price last confirmed 13 days ago
B+
Retailer 9
-
$10,432 USD
View
B+
Retailer 10
-
$10,547 USD
View
B+
Retailer 11
-
$10,855 USD
View
B+
Retailer 12
-
$11,520 USD
£9,071 GBP
View
B+
Retailer 13
-
$14,517 USD
ZAR 234,524 ZAR
View
B
Retailer 14
-
$15,584 USD
€14,842 EUR
View
Retailer 15
-
$17,857 USD
A$27,473 AUD
View
Price last confirmed 9 days ago
B
Retailer 16
-
$22,392 USD
View
B
Retailer 17
-
$30,372 USD
View
Most Expensive
B
Brilliant Earth
18294822A · Oct 31
$36,050 USD
View
17 more retailers have this diamond
Prices start from $7,555 USDSave up to $28,495 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
18.51ct Round
$7,555 USD