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Round|Natural|GIA

1.51ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 6551195115

Certificate GIA 6551195115

Diamond specifications and retailer prices

From £4,195 GBP
As of November 4, 2026
Save £4,686 GBP (53%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £8,881 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6551195115. Listed at 17 retailers as of November 4, 2026, with prices from £4,195 to £8,881, a £4,686 spread on the same certified stone. NZ Jewellers lists it at £8,881. 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
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551195115
Dimensions7.27 × 7.32 × 4.58 mm
L/W Ratio1.01
Culet sizeNone
Top View
7.27 mm7.32 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551195115
Side View
Table 56.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.7%

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: Nov 4
Current: £8,881 GBP|Low: £4,070 GBP|High: £8,881 GBP|Avg: £5,724 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
Retailer 16
November 6, 2026
Retailer 13£4,195 GBP
Retailer 12£4,440 GBP
Retailer 3£4,810 GBP
Retailer 14£4,810 GBP
Retailer 15£4,810 GBP
Retailer 2£5,008 GBP
Retailer 4£5,350 GBP
Retailer 5£5,350 GBP
Retailer 9£5,457 GBP
Retailer 6£5,528 GBP
Retailer 16£5,550 GBP
Retailer 7£5,853 GBP
Retailer 8£6,330 GBP
Retailer 11£7,698 GBP
Retailer 10£7,801 GBP
NZ Jewellers£8,881 GBP

40 data points across 16 retailers

17 retailers£4,195 GBP to £8,881 GBP

B+
Cheapest Retailer
-
£4,195 GBP
B+
Retailer 2
-
£4,358 GBP
View
B+
Retailer 3
-
£4,440 GBP
View
Final sale: no returns
B+
Retailer 4
-
£4,810 GBP
View
Retailer 5
-
£4,810 GBP
View
Price last confirmed 8 days ago
B+
Retailer 6
-
£4,810 GBP
View
B+
Retailer 7
-
£4,899 GBP
View
B+
Retailer 8
-
£5,008 GBP
View
B
Retailer 9
-
£5,350 GBP
View
B
Retailer 10
-
£5,350 GBP
View
B+
Retailer 11
-
£5,457 GBP
View
B
Retailer 12
-
£5,528 GBP
View
B
Retailer 13
-
£5,550 GBP
View
Retailer 14
-
£5,853 GBP
View
Price last confirmed 14 days ago
B
Retailer 15
-
£7,698 GBP
View
B
Retailer 16
-
£7,801 GBP
View
Most Expensive
B
NZ Jewellers
112a2b8c-ffcb-4595-b717-688310880cd5 · Nov 5
£8,881 GBP
$11,953 USD
View
16 more retailers have this diamond
Prices start from £4,195 GBPSave up to £4,686 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+
1.51ct Round
£4,195 GBP