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Cushion|Lab Grown|IGI

1.28ct D FL Cushion Lab Grown Diamond

VG • D/FL • IGI LG800684844

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG800684844

Diamond specifications and retailer prices

From £326 GBP
$438 USD
As of November 3, 2026
Save £2,028 GBP (86%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,355 GBP at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

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 FL clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG800684844 or 800684844. Listed at 12 retailers as of November 2, 2026, with prices from £326 to £2,355, a £2,028 spread on the same certified stone. Do Amore Diamonds lists it at £2,355. 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

1.28
Carat
D
Colour
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle38°
OriginLab Grown
Grading LabIGI
CertificateIGI LG800684844
Dimensions7.00 × 5.85 × 4.06 mm
L/W Ratio1.20
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
7.00 mm5.85 mm1.28 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG800684844
Side View
Table 61.0%Crown 35.2°Girdle: STK-THKPavilion 38°Culet: NoneDepth 69.4%

Caratlytics Score

How it works →
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 3
Current: £2,355 GBP|Low: £326 GBP|High: £2,526 GBP|Avg: £1,016 GBP|-6.8%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 10£326 GBP
Retailer 5£445 GBP
Retailer 8£488 GBP
Retailer 9£526 GBP
Retailer 6£528 GBP
Retailer 3£611 GBP
Retailer 2£1,420 GBP
Retailer 7£1,420 GBP
Retailer 4£1,774 GBP
Do Amore Diamonds£2,355 GBP

29 data points across 10 retailers

12 retailers£326 GBP to £2,355 GBP

A
Cheapest Retailer
-
£326 GBP
$438 USD
Final sale: no returns
A
Retailer 2
-
£445 GBP
$597 USD
View
A
Retailer 3
-
£488 GBP
$655 USD
View
A
Retailer 4
-
£526 GBP
$706 USD
View
A
Retailer 5
-
£528 GBP
$708 USD
View
A
Retailer 6
-
£611 GBP
€781 EUR
View
Retailer 7
-
£1,028 GBP
$1,380 USD
View
Price last confirmed 35 days ago
Retailer 8
-
£1,218 GBP
$1,635 USD
View
Price last confirmed 19 days ago
B
Retailer 9
-
£1,420 GBP
View
B
Retailer 10
-
£1,420 GBP
$1,905 USD
View
B
Retailer 11
-
£1,774 GBP
$2,380 USD
View
Most Expensive
B
Do Amore Diamonds
27-026309141 · Nov 2
£2,355 GBP
$3,160 USD
View
11 more retailers have this diamond
Prices start from £326 GBPSave up to £2,028 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
£326 GBP