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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 $2,630 NZD
$1,480 USD
As of October 31, 2026
Save $3,779 NZD (59%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $7,141 NZD 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
Colour
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: $7,141 NZD|Low: $2,630 NZD|High: $11,013 NZD|Avg: $5,124 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 5$2,630 NZD
Retailer 7$3,284 NZD
Retailer 10$3,574 NZD
Retailer 11$3,677 NZD
Retailer 8$3,811 NZD
Retailer 3$4,106 NZD
Retailer 2$5,239 NZD
Retailer 9$5,975 NZD
Retailer 6$6,409 NZD
NZ Jewellers$7,141 NZD
Retailer 4$10,882 NZD

44 data points across 11 retailers

12 retailers$2,630 NZD to $6,409 NZD

B+
Cheapest Retailer
-
$2,630 NZD
$1,480 USD
B
Retailer 2
-
$3,284 NZD
$1,848 USD
View
B
Retailer 3
-
$3,574 NZD
$2,011 USD
View
B
Retailer 4
-
$3,677 NZD
$2,069 USD
View
Final sale: no returns
B
Retailer 5
-
$3,811 NZD
$2,144 USD
View
Retailer 6
-
$3,811 NZD
$2,144 USD
View
Price last confirmed 20 days ago
B
Retailer 7
-
$4,106 NZD
$2,310 USD
View
B
Retailer 8
-
$5,239 NZD
£2,321 GBP
View
B
Retailer 9
-
$5,975 NZD
$3,362 USD
View
B
Retailer 10
-
$6,409 NZD
$3,606 USD
View
Most Expensive
NZ Jewellers
ab334890-b7dd-48d4-a95b-7a968d70133b · Nov 1
$7,141 NZD
$4,018 USD
View
Price under review
10 more retailers have this diamond
Prices start from $2,630 NZDSave up to $3,779 NZD

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
$2,630 NZD