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Oval|Lab Grown|IGI

1.80ct G SI1 Oval Lab Grown Diamond

ID • G/SI1 • IGI LG508138482

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG508138482

Diamond specifications and retailer prices

From $2,094 NZD
$1,180 USD
As of October 31, 2026
Save $4,304 NZD (67%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $7,129 NZD at NZ Jewellers · As of October 31, 2026
View at NZ Jewellers

About this 1.8ct lab-grown oval diamond

This 1.8ct lab-grown oval 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 LG508138482 or 508138482. Listed at 12 retailers as of October 31, 2026, with a 206% 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 angle34.2°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG508138482
Dimensions9.50 × 6.94 × 4.29 mm
L/W Ratio1.37
Girdle conditionFaceted
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
9.50 mm6.94 mm1.80 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG508138482
Side View
Table 64.0%Crown 34.2°Girdle: THN-STKPavilion 41.2°Culet: NoneDepth 61.8%

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: $10,863 NZD|Low: $2,094 NZD|High: $11,010 NZD|Avg: $5,101 NZD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 3$2,094 NZD
Retailer 5$3,279 NZD
Retailer 8$3,671 NZD
Retailer 6$3,804 NZD
Retailer 9$4,099 NZD
Retailer 2$5,187 NZD
Retailer 7$5,965 NZD
Retailer 4$6,398 NZD
Retailer 1$10,863 NZD

41 data points across 9 retailers

12 retailers$2,094 NZD to $6,398 NZD

B+
Cheapest Retailer
-
$2,094 NZD
$1,180 USD
B
Retailer 2
-
$3,279 NZD
$1,848 USD
View
B
Retailer 3
-
$3,568 NZD
$2,011 USD
View
B
Retailer 4
-
$3,671 NZD
$2,069 USD
View
Final sale: no returns
Retailer 5
-
$3,804 NZD
$2,144 USD
View
Price last confirmed 20 days ago
B
Retailer 6
-
$3,804 NZD
$2,144 USD
View
B
Retailer 7
-
$4,099 NZD
$2,310 USD
View
B
Retailer 8
-
$5,187 NZD
£2,302 GBP
View
B
Retailer 9
-
$5,965 NZD
$3,362 USD
View
B
Retailer 10
-
$6,398 NZD
$3,606 USD
View
Most Expensive
NZ Jewellers
5e0cc16e-8945-4cca-b726-f41097540ed9 · Oct 31
$7,129 NZD
$4,018 USD
View
Price under review
10 more retailers have this diamond
Prices start from $2,094 NZDSave up to $4,304 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 Oval
$2,094 NZD