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Round|Natural|GIA

1.50ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 2554887121

Certificate GIA 2554887121

Diamond specifications and retailer prices

From £4,407 GBP
HK$46,200 HKD
As of November 1, 2026
Save £3,567 GBP (45%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £9,851 GBP at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.5ct natural round diamond

This 1.5ct natural round sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2554887121. Listed at 14 retailers as of October 29, 2026, with a 81% 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

1.50
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2554887121
Dimensions7.40 × 7.44 × 4.40 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Feather, Indented Natural, Cavity, Needle
Top View
7.40 mm7.44 mm1.50 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2554887121
Side View
Table 61.0%Crown 32.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 59.3%

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: £4,480 GBP|Low: £4,356 GBP|High: £8,185 GBP|Avg: £5,634 GBP|-3.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 5£4,407 GBP
Retailer 1£4,480 GBP
Retailer 2£5,089 GBP
Retailer 8£5,253 GBP
Retailer 10£5,616 GBP
Retailer 9£5,716 GBP
Retailer 4£6,100 GBP
Retailer 3£6,230 GBP
Retailer 6£6,569 GBP
Retailer 7£7,973 GBP

33 data points across 10 retailers

14 retailers£4,407 GBP to £7,973 GBP

A
Cheapest Retailer
-
£4,407 GBP
HK$46,200 HKD
A
Retailer 2
-
£4,480 GBP
₹572,527 INR
View
A
Retailer 3
-
£4,605 GBP
A$9,507 AUD
View
Retailer 4
-
£5,089 GBP
SGD 9,229 SGD
View
Price last confirmed 22 days ago
B+
Retailer 5
-
£5,253 GBP
$7,049 USD
View
Final sale: no returns
Retailer 6
-
£5,616 GBP
A$11,595 AUD
View
Price last confirmed 29 days ago
Retailer 7
-
£5,716 GBP
$7,671 USD
View
Price last confirmed 13 days ago
B+
Retailer 8
-
£5,855 GBP
A$12,088 AUD
View
Retailer 9
-
£5,890 GBP
$7,904 USD
View
Price last confirmed 34 days ago
B+
Retailer 10
-
£6,100 GBP
€7,796 EUR
View
B+
Retailer 11
-
£6,230 GBP
View
B
Retailer 12
-
£6,569 GBP
$8,815 USD
View
B
Retailer 13
-
£7,973 GBP
View
Most Expensive
NZ Jewellers
4e892bac-32ee-4fd1-b16a-f0b1602a8d3c · Sep 28
£9,851 GBP
$13,220 USD
View
Price last confirmed 35 days ago
13 more retailers have this diamond
Prices start from £4,407 GBPSave up to £3,567 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
1.50ct Round
£4,407 GBP