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Cushion|Lab Grown|IGI

1.83ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG478107094

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG478107094

Diamond specifications and retailer prices

From £409 GBP
$544 USD
As of October 29, 2026
Save £1,506 GBP (79%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,959 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 1.83ct lab-grown cushion diamond

This 1.83ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG478107094 or 478107094. Listed at 12 retailers as of October 29, 2026, with a 369% 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

1.83
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.8°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG478107094
Dimensions7.22 × 6.91 × 4.72 mm
L/W Ratio1.04
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.22 mm6.91 mm1.83 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG478107094
Side View
Table 61.5%Crown 36.8°Girdle: MED-THKPavilion 39.5°Culet: NoneDepth 68.3%

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 29
Current: £2,959 GBP|Low: £413 GBP|High: £2,959 GBP|Avg: £1,149 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 7£413 GBP
Retailer 4£586 GBP
Retailer 10£601 GBP
Retailer 9£649 GBP
Retailer 2£756 GBP
Retailer 6£924 GBP
Retailer 8£1,179 GBP
Retailer 5£1,720 GBP
Retailer 3£1,914 GBP
Do Amore Diamonds£2,959 GBP

43 data points across 10 retailers

12 retailers£409 GBP to £1,914 GBP

A
Cheapest Retailer
-
£409 GBP
$544 USD
A
Retailer 2
-
£413 GBP
$550 USD
View
B+
Retailer 3
-
£522 GBP
$695 USD
View
B+
Retailer 4
-
£586 GBP
View
B+
Retailer 5
-
£601 GBP
$801 USD
View
B+
Retailer 6
-
£649 GBP
$864 USD
View
B+
Retailer 7
-
£756 GBP
View
B
Retailer 8
-
£924 GBP
$1,230 USD
View
B
Retailer 9
-
£1,179 GBP
$1,570 USD
View
B
Retailer 10
-
£1,720 GBP
CA$3,181 CAD
View
B
Retailer 11
-
£1,914 GBP
View
Most Expensive
Do Amore Diamonds
27-BF41D4A58 · Oct 29
£2,959 GBP
$3,940 USD
View
Price under review
11 more retailers have this diamond
Prices start from £409 GBPSave up to £1,506 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
1.83ct Cushion
£409 GBP