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Round|Natural|GIA

1.51ct M SI2 Round Natural Diamond

EX • M/SI2 • GIA 6561676300

Certificate GIA 6561676300

Diamond specifications and retailer prices

From £1,664 GBP
As of November 6, 2026
Save £3,007 GBP (64%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £4,671 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded M colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6561676300. Listed at 13 retailers as of November 5, 2026, with prices from £1,664 to £4,671, a £3,007 spread on the same certified stone. NZ Jewellers lists it at £4,671. 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

1.51
Carat
M
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 6561676300
Dimensions7.24 × 7.30 × 4.62 mm
L/W Ratio1.01
Star length50%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Twinning Wisp, Feather, Needle, Natural
Top View
7.24 mm7.30 mm1.51 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6561676300
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 63.5%

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: £4,671 GBP|Low: £1,664 GBP|High: £4,671 GBP|Avg: £2,498 GBP|+15.0%
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
November 6, 2026
Retailer 11£1,664 GBP
Retailer 9£2,001 GBP
Retailer 4£2,010 GBP
Retailer 5£2,146 GBP
Retailer 8£2,234 GBP
Retailer 10£2,320 GBP
Retailer 3£2,332 GBP
Retailer 6£2,340 GBP
Retailer 13£2,502 GBP
Retailer 12£2,578 GBP
Retailer 7£2,595 GBP
Retailer 2£2,949 GBP
NZ Jewellers£4,671 GBP

12 data points across 13 retailers

13 retailers£1,664 GBP to £4,671 GBP

A
Cheapest Retailer
-
£1,664 GBP
B+
Retailer 2
-
£2,001 GBP
View
B+
Retailer 3
-
£2,010 GBP
View
B+
Retailer 4
-
£2,146 GBP
View
B+
Retailer 5
-
£2,234 GBP
View
B+
Retailer 6
-
£2,320 GBP
View
Retailer 7
-
£2,332 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£2,340 GBP
View
B+
Retailer 9
-
£2,502 GBP
View
B+
Retailer 10
-
£2,578 GBP
View
B+
Retailer 11
-
£2,595 GBP
View
B
Retailer 12
-
£2,949 GBP
View
Most Expensive
C
NZ Jewellers
16af0689-024b-484a-978b-e88b7ce78d30 · Nov 5
£4,671 GBP
$6,287 USD
View
12 more retailers have this diamond
Prices start from £1,664 GBPSave up to £3,007 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
1.51ct Round
£1,664 GBP