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Cushion|Lab Grown|IGI

1.83ct G SI1 Cushion Lab Grown Diamond

VG • G/SI1 • IGI LG515227078

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG515227078

Diamond specifications and retailer prices

From £402 GBP
$539 USD
As of November 1, 2026
Save £1,523 GBP (79%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,926 GBP at Do Amore Diamonds · As of October 31, 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG515227078 or 515227078. Listed at 11 retailers as of October 31, 2026, with prices from £402 to £1,926, a £1,523 spread on the same certified stone. Do Amore Diamonds lists it at £1,926. 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

1.83
Carat
G
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG515227078
Dimensions6.99 × 6.91 × 4.82 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
6.99 mm6.91 mm1.83 ctG / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG515227078
Side View
Table 61.5%Crown 34.5°Girdle: STK-VTKPavilion 40.2°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: Nov 1
Current: £1,926 GBP|Low: £211 GBP|High: £1,926 GBP|Avg: £740 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 8£269 GBP
Retailer 7£402 GBP
Retailer 5£403 GBP
Retailer 9£443 GBP
Retailer 2£526 GBP
Retailer 11£700 GBP
Retailer 6£746 GBP
Retailer 3£961 GBP
Retailer 10£1,075 GBP
Retailer 4£1,196 GBP
Do Amore Diamonds£1,926 GBP

37 data points across 11 retailers

11 retailers£402 GBP to £1,926 GBP

Retailer 1
-
£269 GBP
$360 USD
Price last confirmed 7 days ago
B+
Retailer 2
-
£402 GBP
$539 USD
View
B+
Retailer 3
-
£403 GBP
$540 USD
View
B+
Retailer 4
-
£443 GBP
$593 USD
View
B+
Retailer 5
-
£526 GBP
View
B+
Retailer 6
-
£700 GBP
$938 USD
View
B+
Retailer 7
-
£746 GBP
$1,000 USD
View
B
Retailer 8
-
£961 GBP
$1,288 USD
View
B
Retailer 9
-
£1,075 GBP
$1,441 USD
View
B
Retailer 10
-
£1,196 GBP
View
Most Expensive
C
Do Amore Diamonds
27-4E9089D8C · Oct 31
£1,926 GBP
$2,580 USD
View
10 more retailers have this diamond
Prices start from £402 GBPSave up to £1,523 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+
1.83ct Cushion
£402 GBP