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Round|Lab Grown|IGI

1.91ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG485161819

Shape and cutting style on the report: Round brilliant

Certificate IGI LG485161819

Diamond specifications and retailer prices

From €954 EUR
$1,070 USD
As of November 2, 2026
Save €4,183 EUR (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €5,137 EUR at MOH London · As of October 29, 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 LG485161819 or 485161819. Listed at 11 retailers as of October 29, 2026, with prices from €954 to €5,137, a €4,183 spread on the same certified stone. MOH London lists it at €5,137. 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
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG485161819
Dimensions7.99 × 7.95 × 4.83 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
7.99 mm7.95 mm1.91 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG485161819
Side View
Table 59.5%Crown 35.2°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 60.6%

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: Nov 2
Current: €5,137 EUR|Low: €954 EUR|High: €5,178 EUR|Avg: €2,504 EUR|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 2€954 EUR
Retailer 4€1,542 EUR
Retailer 7€1,728 EUR
Retailer 5€1,789 EUR
Retailer 8€1,939 EUR
Retailer 9€2,397 EUR
Retailer 6€2,809 EUR
Retailer 3€3,085 EUR
MOH London€5,137 EUR

15 data points across 9 retailers

11 retailers€954 EUR to €5,137 EUR

A
Cheapest Retailer
-
€954 EUR
$1,070 USD
B+
Retailer 2
-
€1,542 EUR
$1,730 USD
View
B+
Retailer 3
-
€1,678 EUR
$1,882 USD
View
B+
Retailer 4
-
€1,728 EUR
$1,938 USD
View
Final sale: no returns
B+
Retailer 5
-
€1,789 EUR
$2,007 USD
View
Retailer 6
-
€1,789 EUR
$2,007 USD
View
Price last confirmed 20 days ago
B+
Retailer 7
-
€1,939 EUR
$2,175 USD
View
B
Retailer 8
-
€2,809 EUR
$3,151 USD
View
B
Retailer 9
-
€3,085 EUR
$3,460 USD
View
B
Retailer 10
-
€3,354 EUR
$3,762 USD
View
Most Expensive
B
MOH London
LG485161819 · Oct 29
€5,137 EUR
£4,537 GBP
View
10 more retailers have this diamond
Prices start from €954 EURSave up to €4,183 EUR

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
€954 EUR