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Round|Lab Grown|IGI

1.91ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG488156540

Shape and cutting style on the report: Round brilliant

Certificate IGI LG488156540

Diamond specifications and retailer prices

From $1,070 USD
As of October 31, 2026
Save $4,662 USD (81%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $5,732 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.91ct lab-grown round diamond

This 1.91ct lab-grown round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG488156540 or 488156540. Listed at 12 retailers as of October 31, 2026, with prices from $1,070 to $5,732, a $4,662 spread on the same certified stone. MOH London lists it at $5,732. 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

1.91
Carat
I
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG488156540
Dimensions8.00 × 7.94 × 4.89 mm
L/W Ratio1.01
Girdle conditionFaceted
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
8.00 mm7.94 mm1.91 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG488156540
Side View
Table 55.0%Crown 35°Girdle: MediumPavilion 40.2°Culet: NoneDepth 61.3%

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: Oct 31
Current: $5,732 USD|Low: $1,070 USD|High: $5,800 USD|Avg: $2,674 USD
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 1, 2026
Retailer 7$1,070 USD
Retailer 9$1,730 USD
Retailer 12$1,882 USD
Retailer 14$1,938 USD
Retailer 3$2,007 USD
Retailer 10$2,007 USD
Retailer 6$2,039 USD
Retailer 4$2,175 USD
Retailer 5$2,688 USD
Retailer 11$3,151 USD
Retailer 8$3,460 USD
Retailer 2$3,630 USD
Retailer 13$3,762 USD
MOH London$5,732 USD

38 data points across 14 retailers

12 retailers$1,070 USD to $5,732 USD

A
Cheapest Retailer
-
$1,070 USD
B+
Retailer 2
-
$1,730 USD
View
B+
Retailer 3
-
$1,882 USD
View
B+
Retailer 4
-
$1,938 USD
View
Final sale: no returns
Retailer 5
-
$2,007 USD
View
Price last confirmed 20 days ago
B+
Retailer 6
-
$2,007 USD
View
B+
Retailer 7
-
$2,175 USD
View
B
Retailer 8
-
$3,151 USD
View
B
Retailer 9
-
$3,460 USD
View
B
Retailer 10
-
$3,630 USD
£2,858 GBP
View
B
Retailer 11
-
$3,762 USD
View
Most Expensive
B
MOH London
LG488156540 · Nov 1
$5,732 USD
£4,513 GBP
View
11 more retailers have this diamond
Prices start from $1,070 USDSave up to $4,662 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.

A
1.91ct Round
$1,070 USD