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 €6,736 EUR
£5,949 GBP
As of October 30, 2026
Save €25,406 EUR (79%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: €32,141 EUR 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 €6,736 to €32,141, a €25,406 spread on the same certified stone. Brilliant Earth lists it at €32,141. 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: €32,141 EUR|Low: €6,713 EUR|High: €33,060 EUR|Avg: €12,649 EUR|-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 1, 2026
Retailer 12€6,736 EUR
Retailer 18€7,208 EUR
Retailer 9€7,496 EUR
Retailer 7€7,893 EUR
Retailer 5€8,361 EUR
Retailer 10€8,361 EUR
Retailer 14€8,363 EUR
Retailer 16€8,764 EUR
Retailer 17€9,301 EUR
Retailer 6€9,403 EUR
Retailer 4€9,678 EUR
Retailer 2€10,271 EUR
Retailer 13€12,943 EUR
Retailer 11€13,894 EUR
Retailer 15€15,921 EUR
Retailer 3€19,964 EUR
Retailer 8€27,079 EUR
Brilliant Earth€32,141 EUR

35 data points across 18 retailers

18 retailers€6,736 EUR to €32,141 EUR

A
Cheapest Retailer
-
€6,736 EUR
£5,949 GBP
A
Retailer 2
-
€7,208 EUR
$8,084 USD
View
A
Retailer 3
-
€7,496 EUR
$8,408 USD
View
A
Retailer 4
-
€7,893 EUR
$8,853 USD
View
Retailer 5
-
€8,361 EUR
$9,378 USD
View
Price last confirmed 20 days ago
B+
Retailer 6
-
€8,361 EUR
$9,378 USD
View
B+
Retailer 7
-
€8,363 EUR
$9,380 USD
View
Retailer 8
-
€8,764 EUR
$9,830 USD
View
Price last confirmed 15 days ago
B+
Retailer 9
-
€9,301 EUR
$10,432 USD
View
B+
Retailer 10
-
€9,403 EUR
$10,547 USD
View
B+
Retailer 11
-
€9,678 EUR
$10,855 USD
View
B+
Retailer 12
-
€10,271 EUR
£9,071 GBP
View
B+
Retailer 13
-
€12,943 EUR
ZAR 234,524 ZAR
View
B
Retailer 14
-
€13,894 EUR
View
Retailer 15
-
€15,921 EUR
A$27,473 AUD
View
Price last confirmed 10 days ago
B
Retailer 16
-
€19,964 EUR
$22,392 USD
View
B
Retailer 17
-
€27,079 EUR
$30,372 USD
View
Most Expensive
B
Brilliant Earth
18294822A · Oct 31
€32,141 EUR
$36,050 USD
View
17 more retailers have this diamond
Prices start from €6,736 EURSave up to €25,406 EUR

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
€6,736 EUR