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Cushion|Lab Grown|IGI

1.67ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG533220807

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG533220807

Diamond specifications and retailer prices

From £227 GBP
$304 USD
As of October 30, 2026
Save £960 GBP (81%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,187 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.67ct lab-grown cushion diamond

This 1.67ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG533220807 or 533220807. Listed at 14 retailers as of October 30, 2026, with prices from £227 to £1,187, a £960 spread on the same certified stone. Brilliant Earth lists it at £1,187. 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

1.67
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG533220807
Dimensions6.98 × 6.95 × 4.56 mm
L/W Ratio1.00
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
6.98 mm6.95 mm1.67 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG533220807
Side View
Table 61.0%Crown 36.3°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 65.6%

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: Oct 30
Current: £1,187 GBP|Low: £224 GBP|High: £1,202 GBP|Avg: £528 GBP|-1.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 3£227 GBP
Retailer 12£251 GBP
Retailer 5£279 GBP
Retailer 11£336 GBP
Retailer 8£369 GBP
Retailer 6£437 GBP
Retailer 7£446 GBP
Retailer 4£451 GBP
Retailer 10£636 GBP
Retailer 9£802 GBP
Retailer 2£1,005 GBP
Brilliant Earth£1,187 GBP

42 data points across 12 retailers

14 retailers£227 GBP to £1,187 GBP

A
Cheapest Retailer
-
£227 GBP
$304 USD
Final sale: no returns
Retailer 2
-
£251 GBP
$336 USD
View
Price last confirmed 7 days ago
A
Retailer 3
-
£279 GBP
View
B+
Retailer 4
-
£336 GBP
$450 USD
View
A
Retailer 5
-
£369 GBP
$495 USD
View
A
Retailer 6
-
£437 GBP
View
A
Retailer 7
-
£446 GBP
€569 EUR
View
B+
Retailer 8
-
£451 GBP
$604 USD
View
B+
Retailer 9
-
£454 GBP
$608 USD
View
B+
Retailer 10
-
£636 GBP
$852 USD
View
Retailer 11
-
£802 GBP
$1,075 USD
View
Price last confirmed 11 days ago
B
Retailer 12
-
£844 GBP
$1,131 USD
View
B
Retailer 13
-
£1,005 GBP
View
Most Expensive
B
Brilliant Earth
11226141A · Oct 31
£1,187 GBP
$1,590 USD
View
13 more retailers have this diamond
Prices start from £227 GBPSave up to £960 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
1.67ct Cushion
£227 GBP