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Oval|Lab Grown|IGI

1.00ct J SI2 Oval Lab Grown Diamond

VG • J/SI2 • IGI LG450027318

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG450027318

Diamond specifications and retailer prices

From $1,809 NZD
As of November 4, 2026
Save $393 NZD (18%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $3,597 NZD at MOH London · As of October 26, 2026
View at MOH London

About this 1ct lab-grown oval diamond

This 1ct lab-grown oval sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI LG450027318 or 450027318. Listed at 5 retailers as of November 4, 2026, with a relatively tight 22% spread, which is unusual at this carat range and suggests competitive pricing across the listings. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.00
Carat
J
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryGood
FluorescenceFaint
Crown angle39.8°
Pavilion angle41.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG450027318
Dimensions7.51 × 5.28 × 3.78 mm
L/W Ratio1.42
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.51 mm5.28 mm1.00 ctJ / SI2
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceFaint
CertificateIGI LG450027318
Side View
Table 56.5%Crown 39.8°Girdle: THK-VTKPavilion 41.7°Culet: NoneDepth 71.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $3,597 NZD|Low: $1,302 NZD|High: $3,636 NZD|Avg: $2,343 NZD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 26, 2026
Retailer 9$1,302 NZD
Retailer 3$1,809 NZD
Retailer 4$1,880 NZD
Retailer 5$2,168 NZD
Retailer 7$2,203 NZD
Retailer 8$2,332 NZD
Retailer 2$2,733 NZD
Retailer 6$3,247 NZD
MOH London$3,597 NZD

14 data points across 9 retailers

5 retailers$1,809 NZD to $2,203 NZD

B
Cheapest Retailer
-
$1,809 NZD
Final sale: no returns
B
Retailer 2
-
$1,880 NZD
View
C
Retailer 3
-
$2,203 NZD
View
Retailer 4
-
$3,247 NZD
View
Price last confirmed 24 days ago
Most Expensive
MOH London
DD08C7E5F · Oct 26
$3,597 NZD
£1,570 GBP
View
Price last confirmed 11 days ago
4 more retailers have this diamond
Prices start from $1,809 NZDSave up to $393 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
1.00ct Oval
$1,809 NZD