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Oval|Lab Grown|IGI

1.80ct G SI1 Oval Lab Grown Diamond

ID • G/SI1 • IGI LG497155977

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG497155977

Diamond specifications and retailer prices

From $2,129 NZD
$1,200 USD
As of October 31, 2026
Save $4,269 NZD (67%) vs most expensive(unlock to see where)
13 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 LG497155977 or 497155977. Listed at 13 retailers as of October 31, 2026, with a 201% 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 angle33.7°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG497155977
Dimensions9.67 × 6.83 × 4.25 mm
L/W Ratio1.42
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
9.67 mm6.83 mm1.80 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG497155977
Side View
Table 58.5%Crown 33.7°Girdle: MED-VTKPavilion 41.6°Culet: NoneDepth 62.2%

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: $7,129 NZD|Low: $2,129 NZD|High: $11,010 NZD|Avg: $5,106 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 7$2,129 NZD
Retailer 9$3,279 NZD
Retailer 12$3,568 NZD
Retailer 3$3,671 NZD
Retailer 4$3,804 NZD
Retailer 10$3,804 NZD
Retailer 6$5,187 NZD
Retailer 5$5,205 NZD
Retailer 11$5,965 NZD
Retailer 8$6,398 NZD
NZ Jewellers$7,129 NZD
Retailer 2$10,863 NZD

42 data points across 12 retailers

13 retailers$2,129 NZD to $6,398 NZD

B+
Cheapest Retailer
-
$2,129 NZD
$1,200 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
B
Retailer 5
-
$3,804 NZD
$2,144 USD
View
Retailer 6
-
$3,804 NZD
$2,144 USD
View
Price last confirmed 20 days ago
B
Retailer 7
-
$4,099 NZD
$2,310 USD
View
B
Retailer 8
-
$5,187 NZD
£2,302 GBP
View
B
Retailer 9
-
$5,205 NZD
£2,310 GBP
View
B
Retailer 10
-
$5,965 NZD
$3,362 USD
View
B
Retailer 11
-
$6,398 NZD
$3,606 USD
View
Most Expensive
NZ Jewellers
fbb6ffee-9e31-440c-8e9e-aa63170fdef1 · Oct 31
$7,129 NZD
$4,018 USD
View
Price under review
11 more retailers have this diamond
Prices start from $2,129 NZDSave up to $4,269 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
$2,129 NZD