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Cushion|Lab Grown|IGI

3.29ct D IF Cushion Lab Grown Diamond

ID • D/IF • IGI LG835667275

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG835667275

Diamond specifications and retailer prices

From £1,634 GBP
HK$17,100 HKD
As of October 30, 2026
Save £5,136 GBP (76%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £6,769 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 3.29ct lab-grown cushion diamond

This 3.29ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG835667275 or 835667275. Listed at 14 retailers as of October 29, 2026, with prices from £1,634 to £6,769, a £5,136 spread on the same certified stone. Brilliant Earth lists it at £6,769. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.29
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle34.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG835667275
Dimensions9.96 × 8.00 × 5.18 mm
L/W Ratio1.25
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
9.96 mm8.00 mm3.29 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG835667275
Side View
Table 59.0%Crown 37.2°Girdle: MED-STKPavilion 34.8°Culet: NoneDepth 64.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £1,901 GBP|Low: £1,634 GBP|High: £5,664 GBP|Avg: £3,422 GBP|-10.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 11£1,634 GBP
Retailer 1£1,901 GBP
Retailer 8£2,137 GBP
Retailer 4£2,217 GBP
Retailer 6£2,590 GBP
Retailer 7£3,117 GBP
Retailer 10£3,617 GBP
Retailer 2£3,673 GBP
Retailer 9£3,854 GBP
Retailer 3£4,403 GBP
Retailer 5£4,717 GBP
Retailer 12£5,153 GBP

17 data points across 12 retailers

14 retailers£1,634 GBP to £6,769 GBP

A
Cheapest Retailer
-
£1,634 GBP
HK$17,100 HKD
A
Retailer 2
-
£1,901 GBP
View
A
Retailer 3
-
£2,137 GBP
€2,727 EUR
View
A
Retailer 4
-
£2,217 GBP
$2,970 USD
View
A
Retailer 5
-
£2,590 GBP
$3,470 USD
View
A
Retailer 6
-
£3,117 GBP
ZAR 67,468 ZAR
View
A
Retailer 7
-
£3,617 GBP
$4,847 USD
View
B+
Retailer 8
-
£3,673 GBP
$4,922 USD
View
B+
Retailer 9
-
£3,780 GBP
$5,065 USD
View
B+
Retailer 10
-
£3,854 GBP
View
Retailer 11
-
£4,403 GBP
$5,900 USD
View
Price last confirmed 9 days ago
B+
Retailer 12
-
£4,717 GBP
$6,321 USD
View
B+
Retailer 13
-
£5,153 GBP
$6,905 USD
View
Most Expensive
B
Brilliant Earth
21829129A · Oct 29
£6,769 GBP
$9,070 USD
View
13 more retailers have this diamond
Prices start from £1,634 GBPSave up to £5,136 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
3.29ct Cushion
£1,634 GBP