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Radiant|Lab Grown|IGI

1.00ct J SI2 Radiant Lab Grown Diamond

VG • J/SI2 • IGI LG407988532

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

Certificate IGI LG407988532

Diamond specifications and retailer prices

From $1,046 NZD
As of November 6, 2026
Save $5,093 NZD (83%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $6,140 NZD at MOH London · As of November 3, 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 J colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI LG407988532 or 407988532. Listed at 10 retailers as of November 3, 2026, with prices from $1,046 to $6,140, a $5,093 spread on the same certified stone. MOH London lists it at $6,140. 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
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle48.7°
Pavilion angle33°
OriginLab Grown
Grading LabIGI
CertificateIGI LG407988532
Dimensions6.41 × 4.97 × 3.55 mm
L/W Ratio1.29
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD) Type IIa
Top View
6.41 mm4.97 mm1.00 ctJ / SI2
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG407988532
Side View
Table 71.0%Crown 48.7°Girdle: MediumPavilion 33°Culet: NoneDepth 71.4%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: $6,140 NZD|Low: $1,046 NZD|High: $6,222 NZD|Avg: $2,707 NZD|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 2$1,046 NZD
Retailer 4$1,412 NZD
Retailer 8$1,537 NZD
Retailer 9$1,580 NZD
Retailer 5$1,638 NZD
Retailer 10$2,531 NZD
Retailer 7$2,645 NZD
Retailer 3$3,895 NZD
Retailer 6$4,605 NZD
MOH London$6,140 NZD

13 data points across 10 retailers

10 retailers$1,046 NZD to $6,140 NZD

A
Cheapest Retailer
-
$1,046 NZD
B+
Retailer 2
-
$1,412 NZD
View
B+
Retailer 3
-
$1,537 NZD
View
B+
Retailer 4
-
$1,580 NZD
View
Final sale: no returns
B+
Retailer 5
-
$1,638 NZD
View
Retailer 6
-
$1,638 NZD
View
Price last confirmed 26 days ago
B
Retailer 7
-
$2,645 NZD
View
C
Retailer 8
-
$3,895 NZD
View
C
Retailer 9
-
$4,605 NZD
View
Most Expensive
C
MOH London
LG407988532 · Nov 3
$6,140 NZD
£2,680 GBP
View
9 more retailers have this diamond
Prices start from $1,046 NZDSave up to $5,093 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
$1,046 NZD