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Round|Natural|GIA

1.50ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 1226746537

Certificate GIA 1226746537

Diamond specifications and retailer prices

From £4,653 GBP
$6,234 USD
As of October 31, 2026
Save £5,826 GBP (56%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £10,478 GBP at NZ Jewellers · As of October 30, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1226746537. Listed at 19 retailers as of October 30, 2026, with prices from £4,653 to £10,478, a £5,826 spread on the same certified stone. NZ Jewellers lists it at £10,478. 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
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 1226746537
Dimensions7.35 × 7.31 × 4.52 mm
L/W Ratio1.01
Star length55%
Lower girdle75%
Girdle conditionFaceted
Culet sizeNone
Cert comments
Additional clouds, pinpoints and surface graining are not shown.
Key to symbols
Cloud, Feather, Crystal, Needle, Indented Natural
Top View
7.35 mm7.31 mm1.50 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1226746537
Side View
Table 60.0%Crown 33.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 61.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £10,478 GBP|Low: £4,552 GBP|High: £10,478 GBP|Avg: £6,363 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 9£4,653 GBP
Retailer 6£4,702 GBP
Retailer 3£5,239 GBP
Retailer 7£5,239 GBP
Retailer 10£5,676 GBP
Retailer 8£5,763 GBP
Retailer 4£5,874 GBP
Retailer 2£6,460 GBP
Retailer 11£6,549 GBP
Retailer 5£8,778 GBP
NZ Jewellers£10,478 GBP

39 data points across 11 retailers

19 retailers£4,653 GBP to £10,478 GBP

B+
Cheapest Retailer
-
£4,653 GBP
$6,234 USD
Retailer 2
-
£4,702 GBP
$6,300 USD
View
Price last confirmed 14 days ago
B+
Retailer 3
-
£4,735 GBP
$6,345 USD
View
B+
Retailer 4
-
£4,876 GBP
A$10,051 AUD
View
B+
Retailer 5
-
£4,950 GBP
$6,633 USD
View
B+
Retailer 6
-
£5,239 GBP
$7,020 USD
View
B
Retailer 7
-
£5,239 GBP
$7,020 USD
View
Final sale: no returns
B
Retailer 8
-
£5,580 GBP
$7,476 USD
View
B+
Retailer 9
-
£5,676 GBP
$7,605 USD
View
B+
Retailer 10
-
£5,763 GBP
$7,722 USD
View
B+
Retailer 11
-
£5,874 GBP
View
B
Retailer 12
-
£6,187 GBP
$8,290 USD
View
B
Retailer 13
-
£6,187 GBP
$8,290 USD
View
B
Retailer 14
-
£6,389 GBP
$8,560 USD
View
B
Retailer 15
-
£6,460 GBP
€8,243 EUR
View
B
Retailer 16
-
£6,549 GBP
$8,775 USD
View
Retailer 17
-
£6,901 GBP
$9,246 USD
View
Price last confirmed 9 days ago
B
Retailer 18
-
£8,778 GBP
View
Most Expensive
B
NZ Jewellers
bce9b288-bbd7-49aa-8d67-ae191e7ce395 · Oct 30
£10,478 GBP
$14,040 USD
View
18 more retailers have this diamond
Prices start from £4,653 GBPSave up to £5,826 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.

B+
1.50ct Round
£4,653 GBP