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Radiant|Lab Grown|IGI

0.91ct H SI1 Radiant Lab Grown Diamond

ID • H/SI1 • IGI LG451061911

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

Certificate IGI LG451061911

Diamond specifications and retailer prices

From $987 NZD
£431 GBP
As of November 5, 2026
2 retailers carry this diamond
Most expensive: $987 NZD at Diamond Quarter
View at Diamond Quarter

About this 0.91ct lab-grown radiant diamond

This 0.91ct lab-grown radiant sits in the just-under-one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451061911 or 451061911. Listed at 2 retailers as of November 5, 2026. 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

0.91
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.9°
Pavilion angle29.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451061911
Dimensions6.40 × 4.88 × 3.13 mm
L/W Ratio1.31
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD). Type IIa
Top View
6.40 mm4.88 mm0.91 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451061911
Side View
Table 71.0%Crown 36.9°Girdle: STK-THKPavilion 29.2°Culet: NoneDepth 64.1%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 5
Current: $588 NZD|Low: $115 NZD|High: $1,335 NZD|Avg: $845 NZD|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
September 17, 2026
Retailer 2$346 NZD
Retailer 6$402 NZD
Retailer 1$588 NZD
Retailer 5$626 NZD
Retailer 3$680 NZD
Retailer 7$1,180 NZD
Retailer 8$1,209 NZD
Retailer 4$1,281 NZD

49 data points across 8 retailers

2 retailers

Retailer 1
-
$626 NZD
Price last confirmed 59 days ago
Most Expensive
B+
Diamond Quarter
0.91SI1HLG11DC56N · Nov 5
$987 NZD
£431 GBP
View
1 more retailer has this diamond

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+
0.91ct Radiant
$987 NZD