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Cushion|Lab Grown|IGI

1.05ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG689561794

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG689561794

Diamond specifications and retailer prices

From £146 GBP
As of November 6, 2026
Save £686 GBP (82%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £832 GBP at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 1.05ct lab-grown cushion diamond

This 1.05ct lab-grown cushion sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG689561794 or 689561794. Listed at 13 retailers as of November 6, 2026, with prices from £146 to £832, a £686 spread on the same certified stone. Reve Diamonds lists it at £832. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.05
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle36.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG689561794
Dimensions7.05 × 5.48 × 3.60 mm
L/W Ratio1.29
Girdle conditionFaceted
Culet sizePointed
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
7.05 mm5.48 mm1.05 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG689561794
Side View
Table 62.0%Crown 34.4°Girdle: MED-STKPavilion 36.4°Culet: NoneDepth 65.7%

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 6
Current: £310 GBP|Low: £144 GBP|High: £832 GBP|Avg: £409 GBP|+9.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Reve Diamonds
November 6, 2026
Retailer 12£146 GBP
Retailer 9£262 GBP
Retailer 5£286 GBP
Retailer 11£288 GBP
Retailer 4£300 GBP
Retailer 1£310 GBP
Retailer 10£343 GBP
Retailer 8£403 GBP
Retailer 7£430 GBP
Retailer 3£456 GBP
Retailer 2£561 GBP
Retailer 6£755 GBP
Reve Diamonds£832 GBP

43 data points across 13 retailers

13 retailers£146 GBP to £832 GBP

A
Cheapest Retailer
-
£146 GBP
Final sale: no returns
A
Retailer 2
-
£262 GBP
View
A
Retailer 3
-
£286 GBP
View
A
Retailer 4
-
£288 GBP
View
B+
Retailer 5
-
£310 GBP
View
B+
Retailer 6
-
£343 GBP
View
B+
Retailer 7
-
£403 GBP
View
Retailer 8
-
£424 GBP
View
Price last confirmed 90 days ago
B+
Retailer 9
-
£430 GBP
View
B+
Retailer 10
-
£456 GBP
View
B
Retailer 11
-
£561 GBP
View
B
Retailer 12
-
£755 GBP
View
Most Expensive
B
Reve Diamonds
77376367C · Nov 6
£832 GBP
$1,113 USD
View
12 more retailers have this diamond
Prices start from £146 GBPSave up to £686 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
1.05ct Cushion
£146 GBP