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Cushion|Lab Grown|GIA

1.05ct E SI1 Cushion Lab Grown Diamond

VG • E/SI1 • GIA 6505612888

Certificate GIA 6505612888

Diamond specifications and retailer prices

From £436 GBP
As of October 31, 2026
Save £87 GBP (17%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £523 GBP at Kay Jewelers · As of October 31, 2026
View at Kay Jewelers

About this 1.05ct lab-grown cushion diamond

This 1.05ct lab-grown cushion sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6505612888. Listed at 4 retailers as of October 31, 2026, with prices from £436 to £523, a £87 spread on the same certified stone. Kay Jewelers lists it at £523. 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

1.05
Carat
E
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginLab Grown
Grading LabGIA
CertificateGIA 6505612888
Dimensions6.96 × 5.65 × 3.56 mm
L/W Ratio1.23
Top View
6.96 mm5.65 mm1.05 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6505612888
Side View
Table 58.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 62.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £523 GBP|Low: £433 GBP|High: £672 GBP|Avg: £568 GBP|-22.2%
Kay Jewelers
Retailer 2
Retailer 3
Retailer 4
September 26, 2026
Retailer 4£433 GBP
Retailer 2£436 GBP
Kay Jewelers£523 GBP
Retailer 3£523 GBP

10 data points across 4 retailers

4 retailers£436 GBP to £523 GBP

Retailer 1
-
£433 GBP
Price last confirmed 8 days ago
B+
Retailer 2
-
£436 GBP
View
Retailer 3
-
£523 GBP
View
Price last confirmed 8 days ago
Most Expensive
B
Kay Jewelers
252622113 · Oct 31
£523 GBP
$700 USD
View
3 more retailers have this diamond
Prices start from £436 GBPSave up to £87 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+
1.05ct Cushion
£436 GBP