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Round|Natural|GIA

1.50ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 6501366436

Certificate GIA 6501366436

Diamond specifications and retailer prices

From £1,597 GBP
As of November 4, 2026
Save £2,673 GBP (63%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,271 GBP at NZ Jewellers · As of November 5, 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 M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6501366436. Listed at 15 retailers as of November 4, 2026, with prices from £1,597 to £4,271, a £2,673 spread on the same certified stone. NZ Jewellers lists it at £4,271. 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
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6501366436
Dimensions7.26 × 7.30 × 4.57 mm
L/W Ratio1.01
Star length55%
Lower girdle75%
Top View
7.26 mm7.30 mm1.50 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6501366436
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.8%

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 4
Current: £4,271 GBP|Low: £1,578 GBP|High: £4,271 GBP|Avg: £2,252 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
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 11£1,597 GBP
Retailer 9£1,624 GBP
Retailer 6£1,829 GBP
Retailer 4£2,006 GBP
Retailer 3£2,042 GBP
Retailer 13£2,042 GBP
Retailer 15£2,042 GBP
Retailer 14£2,121 GBP
Retailer 12£2,147 GBP
Retailer 2£2,224 GBP
Retailer 5£2,357 GBP
Retailer 10£2,488 GBP
Retailer 8£2,493 GBP
Retailer 7£3,089 GBP
NZ Jewellers£4,271 GBP

35 data points across 15 retailers

15 retailers£1,597 GBP to £4,271 GBP

A
Cheapest Retailer
-
£1,597 GBP
A
Retailer 2
-
£1,624 GBP
View
A
Retailer 3
-
£1,829 GBP
View
B+
Retailer 4
-
£2,006 GBP
View
Retailer 5
-
£2,042 GBP
View
Price last confirmed 8 days ago
B+
Retailer 6
-
£2,042 GBP
View
B+
Retailer 7
-
£2,042 GBP
View
B+
Retailer 8
-
£2,121 GBP
View
B+
Retailer 9
-
£2,147 GBP
View
B+
Retailer 10
-
£2,224 GBP
View
B+
Retailer 11
-
£2,357 GBP
View
B+
Retailer 12
-
£2,488 GBP
View
B+
Retailer 13
-
£2,493 GBP
View
B
Retailer 14
-
£3,089 GBP
View
Most Expensive
C
NZ Jewellers
7b91fc11-c002-403c-bb64-d19130b7a9df · Nov 5
£4,271 GBP
$5,748 USD
View
14 more retailers have this diamond
Prices start from £1,597 GBPSave up to £2,673 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
£1,597 GBP