CaratHunter
Plans
Cushion|Lab Grown|IGI

1.41ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG515211276

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG515211276

Diamond specifications and retailer prices

From £149 GBP
$199 USD
As of October 30, 2026
Save £658 GBP (82%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £806 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.41ct lab-grown cushion diamond

This 1.41ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG515211276 or 515211276. Listed at 13 retailers as of October 29, 2026, with prices from £149 to £806, a £658 spread on the same certified stone. Brilliant Earth lists it at £806. 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

1.41
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle37.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG515211276
Dimensions6.58 × 6.45 × 4.22 mm
L/W Ratio1.02
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
6.58 mm6.45 mm1.41 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG515211276
Side View
Table 65.0%Crown 33.7°Girdle: MED-VTKPavilion 37.9°Culet: NoneDepth 65.4%

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 30
Current: £806 GBP|Low: £149 GBP|High: £836 GBP|Avg: £413 GBP|-3.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 13£149 GBP
Retailer 12£165 GBP
Retailer 11£182 GBP
Retailer 6£285 GBP
Retailer 10£292 GBP
Retailer 2£293 GBP
Retailer 9£307 GBP
Retailer 3£355 GBP
Retailer 4£427 GBP
Retailer 5£538 GBP
Retailer 8£657 GBP
Retailer 7£771 GBP
Brilliant Earth£806 GBP

44 data points across 13 retailers

13 retailers£149 GBP to £806 GBP

A
Cheapest Retailer
-
£149 GBP
$199 USD
Final sale: no returns
A
Retailer 2
-
£165 GBP
$221 USD
View
A
Retailer 3
-
£182 GBP
HK$1,900 HKD
View
A
Retailer 4
-
£285 GBP
€364 EUR
View
B+
Retailer 5
-
£292 GBP
$391 USD
View
A
Retailer 6
-
£293 GBP
View
Retailer 7
-
£307 GBP
View
Price last confirmed 17 days ago
A
Retailer 8
-
£355 GBP
$476 USD
View
B+
Retailer 9
-
£427 GBP
$572 USD
View
B
Retailer 10
-
£538 GBP
SGD 974 SGD
View
Retailer 11
-
£657 GBP
$880 USD
View
Price last confirmed 10 days ago
B
Retailer 12
-
£771 GBP
View
Most Expensive
B
Brilliant Earth
19056475A · Oct 29
£806 GBP
$1,080 USD
View
12 more retailers have this diamond
Prices start from £149 GBPSave up to £658 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
1.41ct Cushion
£149 GBP