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Princess|Lab Grown|IGI

1.91ct H SI1 Princess Lab Grown Diamond

ID • H/SI1 • IGI LG506100198

Shape and cutting style on the report: Princess cut

Certificate IGI LG506100198

Diamond specifications and retailer prices

From £1,355 GBP
$1,815 USD
As of October 30, 2026
Save £3,140 GBP (70%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £4,495 GBP at MOH London · As of October 27, 2026
View at MOH London

About this 1.91ct lab-grown princess diamond

This 1.91ct lab-grown princess sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG506100198 or 506100198. Listed at 12 retailers as of October 27, 2026, with prices from £1,355 to £4,495, a £3,140 spread on the same certified stone. MOH London lists it at £4,495. 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
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle38.9°
Pavilion angle38.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG506100198
Dimensions6.97 × 6.89 × 4.81 mm
L/W Ratio1.01
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
6.97 mm6.89 mm1.91 ctH / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateIGI LG506100198
Side View
Table 71.5%Crown 38.9°Girdle: Slightly ThickPavilion 38.6°Culet: NoneDepth 69.8%

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: £4,495 GBP|Low: £1,355 GBP|High: £4,542 GBP|Avg: £2,522 GBP|+0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 25, 2026
Retailer 5£1,355 GBP
Retailer 6£1,508 GBP
Retailer 8£1,517 GBP
Retailer 12£1,550 GBP
Retailer 4£1,690 GBP
Retailer 9£1,698 GBP
Retailer 11£2,093 GBP
Retailer 7£2,464 GBP
Retailer 2£2,644 GBP
Retailer 10£4,282 GBP
MOH London£4,495 GBP
Retailer 3£4,499 GBP

12 data points across 12 retailers

12 retailers£1,355 GBP to £4,495 GBP

B+
Cheapest Retailer
-
£1,355 GBP
$1,815 USD
B+
Retailer 2
-
£1,474 GBP
$1,975 USD
View
B+
Retailer 3
-
£1,508 GBP
$2,020 USD
View
B+
Retailer 4
-
£1,517 GBP
$2,033 USD
View
Final sale: no returns
Retailer 5
-
£1,572 GBP
$2,106 USD
View
Price last confirmed 19 days ago
B+
Retailer 6
-
£1,572 GBP
$2,106 USD
View
B
Retailer 7
-
£1,698 GBP
$2,275 USD
View
B
Retailer 8
-
£2,464 GBP
$3,302 USD
View
B
Retailer 9
-
£2,644 GBP
$3,542 USD
View
B
Retailer 10
-
£2,946 GBP
$3,947 USD
View
B
Retailer 11
-
£4,282 GBP
$5,737 USD
View
Most Expensive
B
MOH London
LG506100198 · Oct 27
£4,495 GBP
View
11 more retailers have this diamond
Prices start from £1,355 GBPSave up to £3,140 GBP

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+
1.91ct Princess
£1,355 GBP