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Heart|Natural|GIA

0.90ct J SI1 Heart Natural Diamond

EX • J/SI1 • GIA 1543173708

Certificate GIA 1543173708

Diamond specifications and retailer prices

From £497 GBP
HK$5,200 HKD
As of November 1, 2026
Save £731 GBP (60%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £2,296 GBP at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 0.9ct natural heart diamond

This 0.9ct natural heart sits in the just-under-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 1543173708. Listed at 14 retailers as of November 1, 2026, with a 147% 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

0.90
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Pavilion angle40.2°
OriginNatural
Grading LabGIA
CertificateGIA 1543173708
Dimensions5.59 × 6.58 × 4.15 mm
L/W Ratio1.18
Girdle conditionFaceted
Top View
5.59 mm6.58 mm0.90 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1543173708
Side View
Table 55.0%CrownGirdle: STK-VTKPavilion 40.2°Culet: NoneDepth 63.0%

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 1
Current: £691 GBP|Low: £497 GBP|High: £1,345 GBP|Avg: £848 GBP|-14.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 7£497 GBP
Retailer 10£618 GBP
Retailer 6£690 GBP
Retailer 1£691 GBP
Retailer 9£694 GBP
Retailer 12£702 GBP
Retailer 3£706 GBP
Retailer 4£838 GBP
Retailer 2£843 GBP
Retailer 11£1,007 GBP
Retailer 5£1,008 GBP
Retailer 13£1,057 GBP
Retailer 8£1,227 GBP

34 data points across 13 retailers

14 retailers£497 GBP to £1,227 GBP

A
Cheapest Retailer
-
£497 GBP
HK$5,200 HKD
B+
Retailer 2
-
£618 GBP
$828 USD
View
Final sale: no returns
A
Retailer 3
-
£690 GBP
$924 USD
View
A
Retailer 4
-
£691 GBP
View
A
Retailer 5
-
£694 GBP
$930 USD
View
A
Retailer 6
-
£702 GBP
$940 USD
View
Retailer 7
-
£706 GBP
SGD 1,279 SGD
View
Price last confirmed 10 days ago
B+
Retailer 8
-
£838 GBP
SGD 1,518 SGD
View
B+
Retailer 9
-
£843 GBP
$1,129 USD
View
B+
Retailer 10
-
£1,007 GBP
ZAR 21,789 ZAR
View
Retailer 11
-
£1,008 GBP
A$2,078 AUD
View
Price last confirmed 28 days ago
Retailer 12
-
£1,057 GBP
$1,416 USD
View
Price last confirmed 9 days ago
B+
Retailer 13
-
£1,227 GBP
View
Most Expensive
NZ Jewellers
49809009-c699-407d-b902-f73808d4e2c6 · Sep 25
£2,296 GBP
$3,077 USD
View
Price last confirmed 37 days ago
13 more retailers have this diamond
Prices start from £497 GBPSave up to £731 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
0.90ct Heart
£497 GBP