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Cushion|Lab Grown|IGI

1.09ct F VS1 Cushion Lab Grown Diamond

VG • F/VS1 • IGI LG623489891

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG623489891

Diamond specifications and retailer prices

From £133 GBP
$178 USD
As of November 1, 2026
Save £554 GBP (81%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £792 GBP at Reve Diamonds · As of October 11, 2026
View at Reve Diamonds

About this 1.09ct lab-grown cushion diamond

This 1.09ct 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 LG623489891 or 623489891. Listed at 16 retailers as of November 1, 2026, with a 418% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.09
Carat
F
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle30.8°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG623489891
Dimensions6.87 × 5.47 × 3.78 mm
L/W Ratio1.26
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.87 mm5.47 mm1.09 ctF / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG623489891
Side View
Table 67.0%Crown 30.8°Girdle: MED-THKPavilion 41.6°Culet: NoneDepth 69.1%

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: £176 GBP|Low: £133 GBP|High: £792 GBP|Avg: £365 GBP|-1.3%
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
Reve Diamonds
November 2, 2026
Retailer 2£133 GBP
Retailer 15£147 GBP
Retailer 1£176 GBP
Retailer 10£253 GBP
Retailer 8£258 GBP
Retailer 3£266 GBP
Retailer 7£268 GBP
Retailer 12£268 GBP
Retailer 14£279 GBP
Retailer 9£358 GBP
Retailer 5£386 GBP
Retailer 4£395 GBP
Retailer 13£484 GBP
Retailer 6£513 GBP
Retailer 11£687 GBP
Reve Diamonds£792 GBP

35 data points across 16 retailers

16 retailers£133 GBP to £687 GBP

A
Cheapest Retailer
-
£133 GBP
$178 USD
Final sale: no returns
Retailer 2
-
£147 GBP
$197 USD
View
Price last confirmed 16 days ago
A
Retailer 3
-
£176 GBP
View
A
Retailer 4
-
£253 GBP
ZAR 5,495 ZAR
View
A
Retailer 5
-
£258 GBP
View
A
Retailer 6
-
£266 GBP
$357 USD
View
A
Retailer 7
-
£268 GBP
$359 USD
View
A
Retailer 8
-
£268 GBP
€343 EUR
View
A
Retailer 9
-
£279 GBP
View
B+
Retailer 10
-
£358 GBP
A$739 AUD
View
B+
Retailer 11
-
£386 GBP
$518 USD
View
B+
Retailer 12
-
£395 GBP
$530 USD
View
B+
Retailer 13
-
£484 GBP
$650 USD
View
B
Retailer 14
-
£513 GBP
$689 USD
View
B
Retailer 15
-
£687 GBP
View
Most Expensive
Reve Diamonds
3C55B7013 · Oct 11
£792 GBP
$1,063 USD
View
Price last confirmed 22 days ago
15 more retailers have this diamond
Prices start from £133 GBPSave up to £554 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
1.09ct Cushion
£133 GBP