CaratHunter
Plans
Round|Natural|GIA

1.59ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 6555735960

Certificate GIA 6555735960

Diamond specifications and retailer prices

From £3,086 GBP
HK$32,300 HKD
As of November 1, 2026
Save £3,939 GBP (56%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £7,426 GBP at NZ Jewellers · As of September 26, 2026
View at NZ Jewellers

About this 1.59ct natural round diamond

This 1.59ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6555735960. Listed at 12 retailers as of October 27, 2026, with a 128% 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

1.59
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6555735960
Dimensions7.41 × 7.46 × 4.66 mm
L/W Ratio1.01
Key to symbols
Crystal, Feather
Top View
7.41 mm7.46 mm1.59 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555735960
Side View
Table 57.0%CrownGirdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.7%

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: £7,024 GBP|Low: £3,057 GBP|High: £7,345 GBP|Avg: £4,494 GBP|-4.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 6£3,086 GBP
Retailer 3£3,501 GBP
Retailer 5£3,640 GBP
Retailer 8£3,922 GBP
Retailer 7£4,200 GBP
Retailer 9£4,200 GBP
Retailer 10£4,263 GBP
Retailer 4£4,729 GBP
Retailer 2£6,689 GBP
NZ Jewellers£7,024 GBP

44 data points across 10 retailers

12 retailers£3,086 GBP to £7,024 GBP

A
Cheapest Retailer
-
£3,086 GBP
HK$32,300 HKD
A
Retailer 2
-
£3,501 GBP
€4,468 EUR
View
A
Retailer 3
-
£3,640 GBP
$4,877 USD
View
A
Retailer 4
-
£3,922 GBP
SGD 7,102 SGD
View
A
Retailer 5
-
£4,200 GBP
$5,627 USD
View
A
Retailer 6
-
£4,200 GBP
$5,627 USD
View
B+
Retailer 7
-
£4,263 GBP
A$8,788 AUD
View
Retailer 8
-
£4,392 GBP
$5,885 USD
View
Price last confirmed 34 days ago
B+
Retailer 9
-
£4,729 GBP
€6,034 EUR
View
B
Retailer 10
-
£6,689 GBP
View
B
Retailer 11
-
£7,024 GBP
$9,412 USD
View
Most Expensive
NZ Jewellers
0176224d-a7e5-4611-99f4-afb4be051338 · Sep 26
£7,426 GBP
$9,950 USD
View
Price last confirmed 35 days ago
11 more retailers have this diamond
Prices start from £3,086 GBPSave up to £3,939 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
1.59ct Round
£3,086 GBP