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Cushion|Lab Grown|IGI

0.91ct D SI1 Cushion Lab Grown Diamond

VG • D/SI1 • IGI LG576348287

Certificate IGI LG576348287

Diamond specifications and retailer prices

From £371 GBP
$497 USD
As of October 31, 2026
Save £144 GBP (28%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £515 GBP at Kay Jewelers · As of November 1, 2026
View at Kay Jewelers

About this 0.91ct lab-grown cushion diamond

This 0.91ct lab-grown cushion sits in the just-under-one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG576348287 or 576348287. Listed at 4 retailers as of October 31, 2026, with prices from £371 to £515, a £144 spread on the same certified stone. Kay Jewelers lists it at £515. 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

0.91
Carat
D
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG576348287
Dimensions6.55 × 5.33 × 3.61 mm
L/W Ratio1.23
Top View
6.55 mm5.33 mm0.91 ctD / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG576348287
Side View
Table 63.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 67.7%

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 31
Current: £515 GBP|Low: £371 GBP|High: £642 GBP|Avg: £542 GBP|-19.8%
Kay Jewelers
Retailer 2
Retailer 3
Retailer 4
September 26, 2026
Retailer 2£371 GBP
Retailer 4£433 GBP
Kay Jewelers£515 GBP
Retailer 3£515 GBP

11 data points across 4 retailers

4 retailers£371 GBP to £515 GBP

B+
Cheapest Retailer
-
£371 GBP
$497 USD
B
Retailer 2
-
£433 GBP
$580 USD
View
B
Retailer 3
-
£515 GBP
$690 USD
View
Most Expensive
B
Kay Jewelers
247913414 · Nov 1
£515 GBP
$690 USD
View
3 more retailers have this diamond
Prices start from £371 GBPSave up to £144 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+
0.91ct Cushion
£371 GBP