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Cushion|Lab Grown|IGI

1.28ct D VVS1 Cushion Lab Grown Diamond

ID • D/VVS1 • IGI LG794641717

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG794641717

Diamond specifications and retailer prices

From £184 GBP
As of November 4, 2026
Save £753 GBP (80%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,178 GBP at Brilliant Earth · As of October 24, 2026
View at Brilliant Earth

About this 1.28ct lab-grown cushion diamond

This 1.28ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG794641717 or 794641717. Listed at 17 retailers as of November 4, 2026, with a 408% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
D
Colour
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG794641717
Dimensions6.35 × 6.31 × 4.12 mm
L/W Ratio1.01
Girdle conditionFaceted
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
6.35 mm6.31 mm1.28 ctD / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG794641717
Side View
Table 63.0%Crown 33.6°Girdle: MED-THKPavilion 39.4°Culet: NoneDepth 65.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £233 GBP|Low: £182 GBP|High: £938 GBP|Avg: £480 GBP|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 4, 2026
Retailer 9£184 GBP
Retailer 7£202 GBP
Retailer 1£233 GBP
Retailer 14£335 GBP
Retailer 2£349 GBP
Retailer 12£353 GBP
Retailer 8£377 GBP
Retailer 15£479 GBP
Retailer 10£501 GBP
Retailer 11£554 GBP
Retailer 5£697 GBP
Retailer 6£773 GBP
Retailer 4£801 GBP
Retailer 13£820 GBP
Retailer 3£938 GBP

26 data points across 15 retailers

17 retailers£184 GBP to £938 GBP

A
Cheapest Retailer
-
£184 GBP
Final sale: no returns
Retailer 2
-
£202 GBP
View
Price last confirmed 11 days ago
A
Retailer 3
-
£233 GBP
View
A
Retailer 4
-
£335 GBP
View
A
Retailer 5
-
£349 GBP
View
A
Retailer 6
-
£353 GBP
View
A
Retailer 7
-
£377 GBP
View
B+
Retailer 8
-
£479 GBP
View
A
Retailer 9
-
£501 GBP
View
B+
Retailer 10
-
£554 GBP
View
B+
Retailer 11
-
£697 GBP
View
B+
Retailer 12
-
£773 GBP
View
B
Retailer 13
-
£801 GBP
View
B+
Retailer 14
-
£820 GBP
View
Retailer 15
-
£905 GBP
View
Price last confirmed 115 days ago
B
Retailer 16
-
£938 GBP
View
Most Expensive
Brilliant Earth
19355098A · Oct 24
£1,178 GBP
$1,590 USD
View
Price last confirmed 11 days ago
16 more retailers have this diamond
Prices start from £184 GBPSave up to £753 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
1.28ct Cushion
£184 GBP