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Cushion|Lab Grown|IGI

1.03ct F VS1 Cushion Lab Grown Diamond

VG • F/VS1 • IGI LG818658582

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

Certificate IGI LG818658582

Diamond specifications and retailer prices

From £143 GBP
$192 USD
As of November 1, 2026
Save £678 GBP (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £822 GBP at Reve Diamonds · As of November 1, 2026
View at Reve Diamonds

About this 1.03ct lab-grown cushion diamond

This 1.03ct lab-grown cushion sits in the classic one-carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG818658582 or 818658582. Listed at 15 retailers as of November 1, 2026, with prices from £143 to £822, a £678 spread on the same certified stone. Reve Diamonds lists it at £822. 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

1.03
Carat
F
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818658582
Dimensions5.98 × 5.91 × 3.92 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
5.98 mm5.91 mm1.03 ctF / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818658582
Side View
Table 59.0%Crown 34.3°Girdle: THN-STKPavilion 39.2°Culet: NoneDepth 66.3%

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 1
Current: £190 GBP|Low: £140 GBP|High: £822 GBP|Avg: £374 GBP|-0.5%
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
Reve Diamonds
November 2, 2026
Retailer 12£143 GBP
Retailer 6£156 GBP
Retailer 1£190 GBP
Retailer 13£248 GBP
Retailer 9£273 GBP
Retailer 10£274 GBP
Retailer 7£280 GBP
Retailer 2£282 GBP
Retailer 5£306 GBP
Retailer 4£373 GBP
Retailer 8£387 GBP
Retailer 14£550 GBP
Retailer 11£596 GBP
Retailer 3£730 GBP
Reve Diamonds£822 GBP

31 data points across 15 retailers

15 retailers£143 GBP to £822 GBP

A
Cheapest Retailer
-
£143 GBP
$192 USD
Final sale: no returns
Retailer 2
-
£156 GBP
$209 USD
View
Price last confirmed 21 days ago
A
Retailer 3
-
£190 GBP
View
A
Retailer 4
-
£248 GBP
$333 USD
View
A
Retailer 5
-
£273 GBP
ZAR 5,928 ZAR
View
A
Retailer 6
-
£274 GBP
€350 EUR
View
A
Retailer 7
-
£280 GBP
View
A
Retailer 8
-
£282 GBP
$379 USD
View
Retailer 9
-
£306 GBP
View
Price last confirmed 28 days ago
B+
Retailer 10
-
£373 GBP
$500 USD
View
B+
Retailer 11
-
£387 GBP
A$798 AUD
View
B
Retailer 12
-
£550 GBP
$738 USD
View
B
Retailer 13
-
£596 GBP
$800 USD
View
Retailer 14
-
£730 GBP
View
Price last confirmed 8 days ago
Most Expensive
B
Reve Diamonds
8A3D54720 · Nov 1
£822 GBP
$1,102 USD
View
14 more retailers have this diamond
Prices start from £143 GBPSave up to £678 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
1.03ct Cushion
£143 GBP