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Radiant|Lab Grown|IGI

0.91ct I SI1 Radiant Lab Grown Diamond

ID • I/SI1 • IGI LG506195999

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

Certificate IGI LG506195999

Diamond specifications and retailer prices

From $540 USD
As of November 2, 2026
Save $1,970 USD (78%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $3,346 USD at MOH London · As of November 3, 2026
View at MOH London

About this 0.91ct lab-grown radiant diamond

This 0.91ct lab-grown radiant sits in the just-under-one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG506195999 or 506195999. Listed at 10 retailers as of November 1, 2026, with a 365% 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

0.91
Carat
I
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.9°
Pavilion angle29.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG506195999
Dimensions6.61 × 4.59 × 3.22 mm
L/W Ratio1.44
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
6.61 mm4.59 mm0.91 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG506195999
Side View
Table 65.5%Crown 43.9°Girdle: MediumPavilion 29.6°Culet: NoneDepth 70.2%

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: Nov 2
Current: $3,346 USD|Low: $540 USD|High: $3,834 USD|Avg: $1,643 USD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 2$540 USD
Retailer 6$770 USD
Retailer 10$837 USD
Retailer 11$861 USD
Retailer 7$893 USD
Retailer 12$1,070 USD
Retailer 3$1,381 USD
Retailer 9$1,444 USD
Retailer 5$2,123 USD
Retailer 8$2,510 USD
MOH London$3,346 USD
Retailer 4$3,834 USD

14 data points across 12 retailers

10 retailers$540 USD to $2,510 USD

B+
Cheapest Retailer
-
$540 USD
B
Retailer 2
-
$770 USD
View
B
Retailer 3
-
$837 USD
View
B
Retailer 4
-
$861 USD
View
Final sale: no returns
Retailer 5
-
$893 USD
View
Price last confirmed 21 days ago
B
Retailer 6
-
$893 USD
View
B
Retailer 7
-
$1,444 USD
View
B
Retailer 8
-
$2,123 USD
View
B
Retailer 9
-
$2,510 USD
View
Most Expensive
MOH London
LG506195999 · Nov 3
$3,346 USD
£2,635 GBP
View
Price under review
9 more retailers have this diamond
Prices start from $540 USDSave up to $1,970 USD

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
$540 USD