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Cushion|Natural|GIA

1.30ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 1232970786

Certificate GIA 1232970786

Diamond specifications and retailer prices

From £1,980 GBP
As of November 7, 2026
Save £770 GBP (28%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £3,321 GBP at MOH London · As of October 5, 2026
View at MOH London

About this 1.3ct natural cushion diamond

This 1.3ct natural cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1232970786. Listed at 6 retailers as of November 6, 2026, with a 39% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.30
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle35.83°
OriginNatural
Grading LabGIA
CertificateGIA 1232970786
Dimensions7.19 × 5.63 × 3.91 mm
L/W Ratio1.28
Key to symbols
Crystal, Needle, Pinpoint
Top View
7.19 mm5.63 mm1.30 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1232970786
Side View
Table 64.0%CrownGirdle: MED-VTKPavilion 35.83°Culet: NoneDepth 69.5%

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: Nov 7
Current: £3,321 GBP|Low: £1,367 GBP|High: £3,406 GBP|Avg: £2,116 GBP|-2.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 5£1,367 GBP
Retailer 9£1,477 GBP
Retailer 4£1,647 GBP
Retailer 7£1,750 GBP
Retailer 6£1,918 GBP
Retailer 10£1,980 GBP
Retailer 3£2,326 GBP
Retailer 2£2,749 GBP
Retailer 8£2,879 GBP
MOH London£3,321 GBP

22 data points across 10 retailers

6 retailers£1,980 GBP to £2,749 GBP

Retailer 1
-
£1,367 GBP
Price last confirmed 30 days ago
Retailer 2
-
£1,647 GBP
View
Price last confirmed 32 days ago
Retailer 3
-
£1,918 GBP
View
Price last confirmed 32 days ago
A
Retailer 4
-
£1,980 GBP
View
B+
Retailer 5
-
£2,749 GBP
View
Most Expensive
MOH London
296C0F38D · Oct 5
£3,321 GBP
View
Price last confirmed 32 days ago
5 more retailers have this diamond
Prices start from £1,980 GBPSave up to £770 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
1.30ct Cushion
£1,980 GBP