CaratHunter
Plans
Heart|Natural|GIA

1.03ct J SI1 Heart Natural Diamond

EX • J/SI1 • GIA 6551441071

Certificate GIA 6551441071

Diamond specifications and retailer prices

From £1,038 GBP
As of November 6, 2026
Save £340 GBP (25%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,378 GBP at GemTrove · As of November 7, 2026
View at GemTrove

About this 1.03ct natural heart diamond

This 1.03ct natural heart sits in the classic one-carat band, graded J 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 6551441071. Listed at 7 retailers as of November 6, 2026, with prices from £1,038 to £1,378, a £340 spread on the same certified stone. GemTrove lists it at £1,378. 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

1.03
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551441071
Dimensions6.42 × 6.95 × 4.13 mm
L/W Ratio1.08
Culet sizeNone
Key to symbols
Twinning Wisp, Cloud, Needle
Top View
6.42 mm6.95 mm1.03 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6551441071
Side View
Table 60.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 59.4%

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 6
Current: £1,378 GBP|Low: £973 GBP|High: £1,442 GBP|Avg: £1,191 GBP
GemTrove
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 7, 2026
Retailer 4£1,038 GBP
Retailer 3£1,042 GBP
Retailer 5£1,052 GBP
Retailer 2£1,126 GBP
Retailer 7£1,177 GBP
Retailer 6£1,254 GBP
GemTrove£1,378 GBP

40 data points across 7 retailers

7 retailers£1,038 GBP to £1,378 GBP

A
Cheapest Retailer
-
£1,038 GBP
Final sale: no returns
A
Retailer 2
-
£1,042 GBP
View
A
Retailer 3
-
£1,052 GBP
View
A
Retailer 4
-
£1,126 GBP
View
A
Retailer 5
-
£1,177 GBP
View
B+
Retailer 6
-
£1,254 GBP
View
Most Expensive
B+
GemTrove
GT-N-01268903-98 · Nov 7
£1,378 GBP
A$2,838 AUD
View
6 more retailers have this diamond
Prices start from £1,038 GBPSave up to £340 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
1.03ct Heart
£1,038 GBP