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Radiant|Lab Grown|IGI

1.00ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG512205189

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

Certificate IGI LG512205189

Diamond specifications and retailer prices

From $1,068 NZD
$602 USD
As of October 30, 2026
Save $1,003 NZD (48%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $3,481 NZD at NZ Jewellers · As of November 1, 2026
View at NZ Jewellers

About this 1ct lab-grown radiant diamond

This 1ct lab-grown radiant sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512205189 or 512205189. Listed at 13 retailers as of October 30, 2026, with a 94% 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
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.2°
Pavilion angle31.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512205189
Dimensions6.90 × 4.99 × 3.39 mm
L/W Ratio1.38
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
6.90 mm4.99 mm1.00 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512205189
Side View
Table 68.0%Crown 36.2°Girdle: MED-STKPavilion 31.9°Culet: NoneDepth 67.9%

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 30
Current: $3,481 NZD|Low: $1,026 NZD|High: $5,816 NZD|Avg: $2,172 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 7$1,068 NZD
Retailer 3$1,194 NZD
Retailer 11$1,196 NZD
Retailer 9$1,324 NZD
Retailer 8$1,526 NZD
Retailer 5$1,553 NZD
Retailer 10$2,030 NZD
Retailer 2$2,071 NZD
Retailer 6$3,284 NZD
NZ Jewellers$3,481 NZD
Retailer 4$5,746 NZD

43 data points across 11 retailers

13 retailers$1,068 NZD to $2,071 NZD

B+
Cheapest Retailer
-
$1,068 NZD
$602 USD
B
Retailer 2
-
$1,194 NZD
$673 USD
View
Final sale: no returns
B
Retailer 3
-
$1,196 NZD
$674 USD
View
Retailer 4
-
$1,324 NZD
$746 USD
View
Price last confirmed 16 days ago
B
Retailer 5
-
$1,324 NZD
$746 USD
View
B
Retailer 6
-
$1,526 NZD
$860 USD
View
B
Retailer 7
-
$1,553 NZD
$875 USD
View
B
Retailer 8
-
$2,030 NZD
$1,144 USD
View
B
Retailer 9
-
$2,071 NZD
£919 GBP
View
Retailer 10
-
$3,284 NZD
$1,851 USD
View
Price under review
Most Expensive
NZ Jewellers
36276e34-7fa6-4876-9582-f00723faad04 · Nov 1
$3,481 NZD
$1,962 USD
View
Price under review
10 more retailers have this diamond
Prices start from $1,068 NZDSave up to $1,003 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 Radiant
$1,068 NZD