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Heart|Natural|GIA

0.90ct H SI1 Heart Natural Diamond

ID • H/SI1 • GIA 1553181188

Certificate GIA 1553181188

Diamond specifications and retailer prices

From £724 GBP
$972 USD
As of November 1, 2026
Save £1,139 GBP (61%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,340 GBP at NZ Jewellers · As of October 21, 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 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 1553181188. Listed at 15 retailers as of November 1, 2026, with a 157% 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
H
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1553181188
Dimensions6.66 × 5.72 × 4.01 mm
L/W Ratio1.16
Culet sizeNone
Key to symbols
Feather, Cloud, Crystal, Needle, Indented Natural
Top View
6.66 mm5.72 mm0.90 ctH / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553181188
Side View
Table 60.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 60.3%

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: £2,340 GBP|Low: £794 GBP|High: £2,340 GBP|Avg: £1,272 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 3£794 GBP
Retailer 8£869 GBP
Retailer 12£869 GBP
Retailer 10£902 GBP
Retailer 9£1,003 GBP
Retailer 4£1,051 GBP
Retailer 11£1,157 GBP
Retailer 6£1,352 GBP
Retailer 7£1,419 GBP
Retailer 2£1,774 GBP
Retailer 5£1,864 GBP
NZ Jewellers£2,340 GBP

39 data points across 12 retailers

15 retailers£724 GBP to £1,864 GBP

A
Cheapest Retailer
-
£724 GBP
$972 USD
A
Retailer 2
-
£794 GBP
$1,065 USD
View
A
Retailer 3
-
£812 GBP
$1,090 USD
View
Retailer 4
-
£869 GBP
$1,166 USD
View
Price last confirmed 11 days ago
Retailer 5
-
£902 GBP
$1,211 USD
View
Price last confirmed 10 days ago
Retailer 6
-
£1,003 GBP
$1,346 USD
View
Price last confirmed 10 days ago
B+
Retailer 7
-
£1,051 GBP
$1,410 USD
View
B+
Retailer 8
-
£1,051 GBP
$1,410 USD
View
B+
Retailer 9
-
£1,088 GBP
$1,460 USD
View
Retailer 10
-
£1,157 GBP
View
Price last confirmed 36 days ago
B+
Retailer 11
-
£1,352 GBP
€1,728 EUR
View
B+
Retailer 12
-
£1,419 GBP
ZAR 30,756 ZAR
View
B
Retailer 13
-
£1,774 GBP
View
B
Retailer 14
-
£1,864 GBP
View
Most Expensive
NZ Jewellers
f573e1a2-dde6-4659-83aa-2f1f2cf0e659 · Oct 21
£2,340 GBP
$3,140 USD
View
Price last confirmed 12 days ago
14 more retailers have this diamond
Prices start from £724 GBPSave up to £1,139 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
£724 GBP