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Cushion|Natural|GIA

0.80ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 1378723039

Certificate GIA 1378723039

Diamond specifications and retailer prices

From £734 GBP
$975 USD
As of October 28, 2026
Save £267 GBP (27%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £1,001 GBP at Jared · As of October 28, 2026
View at Jared

About this 0.8ct natural cushion diamond

This 0.8ct natural cushion sits in the just-under-one-carat band, graded H 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 1378723039. Listed at 8 retailers as of October 28, 2026, with prices from £734 to £1,001, a £267 spread on the same certified stone. Jared lists it at £1,001. 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

0.80
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1378723039
Dimensions5.33 × 5.07 × 3.44 mm
L/W Ratio1.05
Culet sizeNone
Top View
5.33 mm5.07 mm0.80 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1378723039
Side View
Table 59.0%CrownGirdle: ThickPavilionCulet: NoneDepth 67.8%

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 28
Current: £1,001 GBP|Low: £734 GBP|High: £1,099 GBP|Avg: £877 GBP|-8.9%
Jared
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 19, 2026
Retailer 2£734 GBP
Retailer 7£746 GBP
Retailer 6£783 GBP
Retailer 5£792 GBP
Retailer 4£906 GBP
Retailer 3£971 GBP
Retailer 8£971 GBP
Jared£1,001 GBP

8 data points across 8 retailers

8 retailers£734 GBP to £1,001 GBP

A
Cheapest Retailer
-
£734 GBP
$975 USD
A
Retailer 2
-
£746 GBP
$992 USD
View
A
Retailer 3
-
£783 GBP
$1,040 USD
View
A
Retailer 4
-
£792 GBP
$1,053 USD
View
B+
Retailer 5
-
£906 GBP
$1,204 USD
View
B+
Retailer 6
-
£971 GBP
$1,290 USD
View
B+
Retailer 7
-
£971 GBP
$1,290 USD
View
Most Expensive
B+
Jared
141737523 · Oct 28
£1,001 GBP
$1,330 USD
View
7 more retailers have this diamond
Prices start from £734 GBPSave up to £267 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
0.80ct Cushion
£734 GBP