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Heart|Natural|GIA

0.78ct E SI1 Heart Natural Diamond

EX • E/SI1 • GIA 2566264560

Certificate GIA 2566264560

Diamond specifications and retailer prices

From £617 GBP
As of November 5, 2026
Save £41 GBP (6%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £658 GBP at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

About this 0.78ct natural heart diamond

This 0.78ct natural heart sits in the just-under-one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2566264560. Listed at 3 retailers as of November 5, 2026, with a relatively tight 7% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

0.78
Carat
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2566264560
Dimensions5.20 × 6.35 × 3.87 mm
L/W Ratio1.22
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
5.20 mm6.35 mm0.78 ctE / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 2566264560
Side View
Table 59.0%CrownGirdle: STK-ETKPavilionCulet: NoneDepth 61.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: £658 GBP|Low: £617 GBP|High: £684 GBP|Avg: £641 GBP|+1.7%
77 Diamonds
Retailer 2
Retailer 3
November 6, 2026
Retailer 2£617 GBP
Retailer 3£635 GBP
77 Diamonds£658 GBP

42 data points across 3 retailers

3 retailers£617 GBP to £658 GBP

A
Cheapest Retailer
-
£617 GBP
A
Retailer 2
-
£635 GBP
View
Most Expensive
A
77 Diamonds
HSCPKTAGC4AC · Nov 6
£658 GBP
View
2 more retailers have this diamond
Prices start from £617 GBPSave up to £41 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
0.78ct Heart
£617 GBP