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Round|Natural|GIA

1.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 5443367010

Certificate GIA 5443367010

Diamond specifications and retailer prices

From £3,840 GBP
HK$40,200 HKD
As of October 31, 2026
Save £4,810 GBP (56%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £8,650 GBP at NZ Jewellers · As of October 27, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5443367010. Listed at 19 retailers as of October 27, 2026, with prices from £3,840 to £8,650, a £4,810 spread on the same certified stone. NZ Jewellers lists it at £8,650. 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 5443367010
Dimensions7.36 × 7.40 × 4.50 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
7.36 mm7.40 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5443367010
Side View
Table 57.0%Crown 32°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.0%

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: Oct 31
Current: £3,840 GBP|Low: £3,840 GBP|High: £7,712 GBP|Avg: £5,453 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 1£3,840 GBP
Retailer 3£4,376 GBP
Retailer 9£4,736 GBP
Retailer 10£4,774 GBP
Retailer 11£5,072 GBP
Retailer 2£5,251 GBP
Retailer 5£5,335 GBP
Retailer 4£5,357 GBP
Retailer 6£5,749 GBP
Retailer 7£6,298 GBP
Retailer 8£7,630 GBP

40 data points across 11 retailers

19 retailers£3,840 GBP to £8,650 GBP

A
Cheapest Retailer
-
£3,840 GBP
HK$40,200 HKD
B+
Retailer 2
-
£4,376 GBP
$5,863 USD
View
B+
Retailer 3
-
£4,511 GBP
$6,044 USD
View
B+
Retailer 4
-
£4,521 GBP
$6,057 USD
View
B+
Retailer 5
-
£4,736 GBP
SGD 8,576 SGD
View
B+
Retailer 6
-
£4,774 GBP
$6,397 USD
View
B+
Retailer 7
-
£4,791 GBP
$6,420 USD
View
Retailer 8
-
£5,072 GBP
A$10,455 AUD
View
Price last confirmed 27 days ago
B+
Retailer 9
-
£5,172 GBP
$6,930 USD
View
B+
Retailer 10
-
£5,251 GBP
$7,036 USD
View
B+
Retailer 11
-
£5,291 GBP
$7,090 USD
View
B+
Retailer 12
-
£5,292 GBP
$7,091 USD
View
B+
Retailer 13
-
£5,335 GBP
€6,808 EUR
View
B+
Retailer 14
-
£5,357 GBP
View
B+
Retailer 15
-
£5,749 GBP
View
B+
Retailer 16
-
£5,968 GBP
$7,996 USD
View
B+
Retailer 17
-
£6,298 GBP
ZAR 136,322 ZAR
View
B
Retailer 18
-
£7,630 GBP
View
Most Expensive
B
NZ Jewellers
52f86b50-f4b6-4949-93c9-690b18e8f1aa · Oct 27
£8,650 GBP
$11,590 USD
View
18 more retailers have this diamond
Prices start from £3,840 GBPSave up to £4,810 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
£3,840 GBP