Round|Natural|GIA

1.55ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1533953411

Certificate GIA 1533953411

Diamond specifications and retailer prices

From £2,407 GBP
As of November 6, 2026
Save £1,768 GBP (42%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £4,361 GBP at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.55ct natural round diamond

This 1.55ct natural round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1533953411. Listed at 11 retailers as of November 4, 2026, with a 73% 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

1.55
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1533953411
Dimensions7.41 × 7.35 × 4.60 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Culet sizeNone
Key to symbols
Crystal, Needle
Top View
7.41 mm7.35 mm1.55 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1533953411
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.3%

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 6
Current: £2,574 GBP|Low: £2,163 GBP|High: £4,231 GBP|Avg: £2,816 GBP|+1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 8£2,163 GBP
Retailer 5£2,407 GBP
Retailer 3£2,555 GBP
Retailer 1£2,574 GBP
Retailer 6£2,682 GBP
Retailer 7£2,687 GBP
Retailer 2£3,055 GBP
Retailer 4£4,175 GBP

35 data points across 8 retailers

11 retailers£2,407 GBP to £4,175 GBP

A
Cheapest Retailer
-
£2,407 GBP
Retailer 2
-
£2,503 GBP
View
Price last confirmed 36 days ago
A
Retailer 3
-
£2,555 GBP
View
A
Retailer 4
-
£2,574 GBP
View
Retailer 5
-
£2,600 GBP
View
Price last confirmed 38 days ago
Retailer 6
-
£2,682 GBP
View
Price last confirmed 11 days ago
Retailer 7
-
£2,687 GBP
View
Price last confirmed 34 days ago
Retailer 8
-
£2,889 GBP
View
Price last confirmed 38 days ago
B+
Retailer 9
-
£3,055 GBP
View
B
Retailer 10
-
£4,175 GBP
View
Most Expensive
NZ Jewellers
d46d6bf8-ab55-442a-b520-0a66a8d004ea · Sep 28
£4,361 GBP
$5,870 USD
View
Price last confirmed 39 days ago
10 more retailers have this diamond
Prices start from £2,407 GBPSave up to £1,768 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
1.55ct Round
£2,407 GBP