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Cushion|Lab Grown|IGI

1.89ct H SI1 Cushion Lab Grown Diamond

VG • H/SI1 • IGI LG459199006

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG459199006

Diamond specifications and retailer prices

From £355 GBP
$475 USD
As of November 1, 2026
Save £1,130 GBP (76%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,484 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.89ct lab-grown cushion diamond

This 1.89ct lab-grown cushion sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG459199006 or 459199006. Listed at 10 retailers as of October 29, 2026, with prices from £355 to £1,484, a £1,130 spread on the same certified stone. MOH London lists it at £1,484. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.89
Carat
H
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.2°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG459199006
Dimensions7.81 × 6.66 × 4.64 mm
L/W Ratio1.17
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
7.81 mm6.66 mm1.89 ctH / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG459199006
Side View
Table 62.5%Crown 36.2°Girdle: STK-THKPavilion 39.3°Culet: NoneDepth 69.7%

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 1
Current: £1,484 GBP|Low: £221 GBP|High: £1,494 GBP|Avg: £714 GBP|-0.5%
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 10£309 GBP
Retailer 8£355 GBP
Retailer 5£392 GBP
Retailer 12£406 GBP
Retailer 6£407 GBP
Retailer 11£485 GBP
Retailer 2£498 GBP
Retailer 7£731 GBP
Retailer 9£841 GBP
Retailer 4£1,056 GBP
Retailer 3£1,418 GBP
MOH London£1,484 GBP

26 data points across 12 retailers

10 retailers£355 GBP to £1,484 GBP

A
Cheapest Retailer
-
£355 GBP
$475 USD
A
Retailer 2
-
£392 GBP
€500 EUR
View
B+
Retailer 3
-
£406 GBP
$544 USD
View
A
Retailer 4
-
£407 GBP
$545 USD
View
B+
Retailer 5
-
£485 GBP
$650 USD
View
A
Retailer 6
-
£498 GBP
View
B+
Retailer 7
-
£731 GBP
$980 USD
View
B+
Retailer 8
-
£841 GBP
$1,127 USD
View
B
Retailer 9
-
£1,418 GBP
$1,900 USD
View
Most Expensive
B
MOH London
LG459199006 · Oct 29
£1,484 GBP
View
9 more retailers have this diamond
Prices start from £355 GBPSave up to £1,130 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.

A
1.89ct Cushion
£355 GBP