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Cushion|Lab Grown|IGI

1.33ct D IF Cushion Lab Grown Diamond

GD • D/IF • IGI LG831696418

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

Certificate IGI LG831696418

Diamond specifications and retailer prices

From £403 GBP
$540 USD
As of October 29, 2026
Save £1,202 GBP (75%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,605 GBP at Helzberg Diamonds · As of October 30, 2026
View at Helzberg Diamonds

About this 1.33ct lab-grown cushion diamond

This 1.33ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a standard cut grade and certified by IGI LG831696418 or 831696418. Listed at 18 retailers as of October 29, 2026, with prices from £403 to £1,605, a £1,202 spread on the same certified stone. Helzberg Diamonds lists it at £1,605. 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

1.33
Carat
D
Colour
IF
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle38.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831696418
Dimensions6.28 × 6.23 × 4.12 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
6.28 mm6.23 mm1.33 ctD / IF
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831696418
Side View
Table 63.0%Crown 36.3°Girdle: MED-THKPavilion 38.3°Culet: NoneDepth 66.1%

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: Oct 29
Current: £1,605 GBP|Low: £259 GBP|High: £1,821 GBP|Avg: £772 GBP
Helzberg Diamonds
Retailer 2
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Retailer 19
October 31, 2026
Retailer 8£259 GBP
Retailer 9£287 GBP
Retailer 4£297 GBP
Retailer 18£403 GBP
Retailer 10£467 GBP
Retailer 6£474 GBP
Retailer 2£492 GBP
Retailer 17£493 GBP
Retailer 14£511 GBP
Retailer 3£693 GBP
Retailer 16£700 GBP
Retailer 12£740 GBP
Retailer 5£824 GBP
Retailer 7£957 GBP
Retailer 11£976 GBP
Retailer 15£1,155 GBP
Retailer 19£1,299 GBP
Retailer 13£1,590 GBP
Helzberg Diamonds£1,605 GBP

18 data points across 19 retailers

18 retailers£403 GBP to £1,605 GBP

Retailer 1
-
£287 GBP
$384 USD
Price last confirmed 7 days ago
Retailer 2
-
£297 GBP
View
Price last confirmed 15 days ago
A
Retailer 3
-
£403 GBP
$540 USD
View
A
Retailer 4
-
£467 GBP
$626 USD
View
A
Retailer 5
-
£474 GBP
$635 USD
View
A
Retailer 6
-
£492 GBP
€628 EUR
View
A
Retailer 7
-
£493 GBP
ZAR 10,670 ZAR
View
A
Retailer 8
-
£511 GBP
View
B+
Retailer 9
-
£693 GBP
$929 USD
View
A
Retailer 10
-
£700 GBP
A$1,442 AUD
View
B+
Retailer 11
-
£740 GBP
$991 USD
View
B+
Retailer 12
-
£824 GBP
$1,104 USD
View
B
Retailer 13
-
£957 GBP
$1,282 USD
View
B
Retailer 14
-
£976 GBP
SGD 1,768 SGD
View
B+
Retailer 15
-
£1,155 GBP
View
Retailer 16
-
£1,299 GBP
$1,740 USD
View
Price last confirmed 13 days ago
B
Retailer 17
-
£1,590 GBP
$2,130 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOJHMPMKHO · Oct 30
£1,605 GBP
$2,150 USD
View
17 more retailers have this diamond
Prices start from £403 GBPSave up to £1,202 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
1.33ct Cushion
£403 GBP