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Round|Natural|GIA

1.51ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 5181599972

Certificate GIA 5181599972

Diamond specifications and retailer prices

From £7,709 GBP
$10,345 USD
As of November 1, 2026
Save £8,126 GBP (51%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £15,835 GBP at Diamond Quarter · As of November 2, 2026
View at Diamond Quarter

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5181599972. Listed at 20 retailers as of November 1, 2026, with prices from £7,709 to £15,835, a £8,126 spread on the same certified stone. Diamond Quarter lists it at £15,835. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5181599972
Dimensions7.40 × 7.37 × 4.50 mm
L/W Ratio1.00
Top View
7.40 mm7.37 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5181599972
Side View
Table 59.0%CrownGirdle: THN-STKPavilionCulet: NoneDepth 60.9%

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: Nov 1
Current: £9,354 GBP|Low: £7,257 GBP|High: £14,513 GBP|Avg: £9,932 GBP|-4.8%
Retailer 1
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
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 2, 2026
Retailer 16£7,709 GBP
Retailer 13£7,942 GBP
Retailer 10£8,079 GBP
Retailer 3£8,267 GBP
Retailer 11£8,581 GBP
Retailer 6£8,708 GBP
Retailer 19£8,708 GBP
Retailer 1£9,354 GBP
Retailer 8£9,433 GBP
Retailer 15£9,474 GBP
Retailer 2£9,579 GBP
Retailer 7£10,079 GBP
Retailer 5£10,097 GBP
Retailer 17£10,097 GBP
Retailer 20£10,433 GBP
Retailer 18£10,467 GBP
Retailer 4£10,885 GBP
Retailer 14£12,793 GBP
Retailer 12£13,600 GBP
Retailer 9£14,513 GBP

44 data points across 20 retailers

20 retailers£7,709 GBP to £15,835 GBP

B+
Cheapest Retailer
-
£7,709 GBP
$10,345 USD
B+
Retailer 2
-
£7,942 GBP
$10,658 USD
View
B
Retailer 3
-
£8,079 GBP
$10,842 USD
View
B
Retailer 4
-
£8,267 GBP
CA$15,408 CAD
View
B
Retailer 5
-
£8,581 GBP
$11,515 USD
View
B
Retailer 6
-
£8,708 GBP
$11,686 USD
View
B
Retailer 7
-
£8,708 GBP
$11,686 USD
View
Final sale: no returns
B
Retailer 8
-
£9,354 GBP
View
B
Retailer 9
-
£9,433 GBP
$12,659 USD
View
Retailer 10
-
£9,474 GBP
A$19,560 AUD
View
Price last confirmed 10 days ago
B
Retailer 11
-
£9,579 GBP
$12,854 USD
View
B
Retailer 12
-
£10,079 GBP
$13,525 USD
View
B
Retailer 13
-
£10,097 GBP
$13,550 USD
View
B
Retailer 14
-
£10,097 GBP
$13,550 USD
View
B
Retailer 15
-
£10,433 GBP
$14,000 USD
View
B
Retailer 16
-
£10,885 GBP
$14,607 USD
View
B
Retailer 17
-
£12,793 GBP
ZAR 277,346 ZAR
View
B
Retailer 18
-
£13,600 GBP
View
B
Retailer 19
-
£14,513 GBP
$19,476 USD
View
Most Expensive
B
Diamond Quarter
1.51SI1G517287D1N · Nov 2
£15,835 GBP
View
19 more retailers have this diamond
Prices start from £7,709 GBPSave up to £8,126 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
£7,709 GBP