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Cushion|Natural|IGI

1.51ct H I1 Cushion Natural Diamond

VG • H/I1 • IGI 808620023

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

Certificate IGI 808620023

Diamond specifications and retailer prices

From £1,231 GBP
$1,649 USD
As of November 1, 2026
Save £184 GBP (13%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £1,415 GBP at DreamStone · As of October 31, 2026
View at DreamStone

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and I1 clarity (included), with a very-good cut grade and certified by IGI 808620023. Listed at 3 retailers as of October 31, 2026, with a relatively tight 15% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

1.51
Carat
H
Colour
I1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34.2°
Pavilion angle33.2°
OriginNatural
Grading LabIGI
CertificateIGI 808620023
Dimensions6.42 × 6.18 × 4.28 mm
L/W Ratio1.04
Girdle conditionFaceted
Top View
6.42 mm6.18 mm1.51 ctH / I1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 808620023
Side View
Table 62.0%Crown 34.2°Girdle: STK-THKPavilion 33.2°CuletDepth 69.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £1,415 GBP|Low: £1,231 GBP|High: £1,415 GBP|Avg: £1,328 GBP
DreamStone
Retailer 2
Retailer 3
October 12, 2026
Retailer 3£1,231 GBP
Retailer 2£1,350 GBP
DreamStone£1,415 GBP

2 data points across 3 retailers

3 retailers£1,231 GBP to £1,415 GBP

B+
Cheapest Retailer
-
£1,231 GBP
$1,649 USD
B+
Retailer 2
-
£1,350 GBP
$1,809 USD
View
Most Expensive
B+
DreamStone
6ac948c7574cc217a2399a32 · Oct 31
£1,415 GBP
$1,896 USD
View
2 more retailers have this diamond
Prices start from £1,231 GBPSave up to £184 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.

B+
1.51ct Cushion
£1,231 GBP