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Radiant|Lab Grown|IGI

1.00ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG677580013

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

Certificate IGI LG677580013

Diamond specifications and retailer prices

From $364 NZD
As of November 6, 2026
Save $1,093 NZD (75%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,115 NZD at MOH London · As of October 25, 2026
View at MOH London

About this 1ct lab-grown radiant diamond

This 1ct lab-grown radiant sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG677580013 or 677580013. Listed at 15 retailers as of November 4, 2026, with a 300% 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

1.00
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG677580013
Dimensions6.88 × 4.92 × 3.27 mm
L/W Ratio1.40
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.88 mm4.92 mm1.00 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG677580013
Side View
Table 66.0%Crown 37.4°Girdle: STK-THKPavilionCulet: NoneDepth 66.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $2,115 NZD|Low: $350 NZD|High: $2,137 NZD|Avg: $834 NZD|+4.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 9$364 NZD
Retailer 4$408 NZD
Retailer 14$422 NZD
Retailer 3$451 NZD
Retailer 11$451 NZD
Retailer 5$552 NZD
Retailer 2$583 NZD
Retailer 13$785 NZD
Retailer 7$821 NZD
Retailer 6$877 NZD
Retailer 10$1,046 NZD
Retailer 12$1,452 NZD
Retailer 8$1,458 NZD
MOH London$2,115 NZD

45 data points across 14 retailers

15 retailers$364 NZD to $1,458 NZD

A
Cheapest Retailer
-
$364 NZD
A
Retailer 2
-
$408 NZD
View
Final sale: no returns
A
Retailer 3
-
$422 NZD
View
A
Retailer 4
-
$451 NZD
View
Retailer 5
-
$451 NZD
View
Price last confirmed 13 days ago
A
Retailer 6
-
$552 NZD
View
A
Retailer 7
-
$583 NZD
View
B+
Retailer 8
-
$785 NZD
View
B+
Retailer 9
-
$821 NZD
View
B+
Retailer 10
-
$877 NZD
View
B+
Retailer 11
-
$900 NZD
View
B+
Retailer 12
-
$1,046 NZD
View
B
Retailer 13
-
$1,452 NZD
View
B
Retailer 14
-
$1,458 NZD
View
Most Expensive
MOH London
LG677580013 · Oct 25
$2,115 NZD
£923 GBP
View
Price last confirmed 12 days ago
14 more retailers have this diamond
Prices start from $364 NZDSave up to $1,093 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.

A
1.00ct Radiant
$364 NZD