Radiant|Lab Grown|IGI

1.80ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG538275665

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

Certificate IGI LG538275665

Diamond specifications and retailer prices

From $1,480 USD
As of October 31, 2026
Save $2,126 USD (59%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $4,018 USD at NZ Jewellers · As of November 1, 2026
View at NZ Jewellers

About this 1.8ct lab-grown radiant diamond

This 1.8ct lab-grown radiant sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG538275665 or 538275665. Listed at 12 retailers as of October 31, 2026, with a 144% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.80
Carat
G
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.2°
Pavilion angle34.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG538275665
Dimensions8.77 × 6.06 × 3.99 mm
L/W Ratio1.45
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.77 mm6.06 mm1.80 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG538275665
Side View
Table 68.5%Crown 38.2°Girdle: STK-THKPavilion 34.3°Culet: NoneDepth 65.8%

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: $4,018 USD|Low: $1,477 USD|High: $6,196 USD|Avg: $2,876 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 5$1,480 USD
Retailer 7$1,848 USD
Retailer 10$2,011 USD
Retailer 11$2,069 USD
Retailer 8$2,144 USD
Retailer 3$2,310 USD
Retailer 4$2,948 USD
Retailer 9$3,362 USD
Retailer 6$3,606 USD
NZ Jewellers$4,018 USD
Retailer 2$6,123 USD

44 data points across 11 retailers

12 retailers$1,480 USD to $3,606 USD

B+
Cheapest Retailer
-
$1,480 USD
B
Retailer 2
-
$1,848 USD
View
B
Retailer 3
-
$2,011 USD
View
B
Retailer 4
-
$2,069 USD
View
Final sale: no returns
B
Retailer 5
-
$2,144 USD
View
Retailer 6
-
$2,144 USD
View
Price last confirmed 20 days ago
B
Retailer 7
-
$2,310 USD
View
B
Retailer 8
-
$2,948 USD
£2,321 GBP
View
B
Retailer 9
-
$3,362 USD
View
B
Retailer 10
-
$3,606 USD
View
Most Expensive
NZ Jewellers
ab334890-b7dd-48d4-a95b-7a968d70133b · Nov 1
$4,018 USD
View
Price under review
10 more retailers have this diamond
Prices start from $1,480 USDSave up to $2,126 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+
1.80ct Radiant
$1,480 USD