Round|Natural|GIA

1.51ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 3415658160

Certificate GIA 3415658160

Diamond specifications and retailer prices

From £5,754 GBP

$7,710 USD

As of October 31, 2026

Save £9,490 GBP (62%) vs most expensive(unlock to see where)

27 retailers carry this diamond

Most expensive: £15,244 GBP at Diamond Quarter · As of October 31, 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 3415658160. Listed at 27 retailers as of October 31, 2026, with prices from £5,754 to £15,244, a £9,490 spread on the same certified stone. Diamond Quarter lists it at £15,244. 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

Colour

SI1

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle33.5°

Pavilion angle41.4°

OriginNatural

Grading LabGIA

CertificateGIA 3415658160

Dimensions7.34 × 7.30 × 4.59 mm

L/W Ratio1.01

View GIA Report →View Loupe360 Video →

Top View

OriginNatural

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateGIA 3415658160

Side View

Caratlytics Score

How it works →

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: £9,955 GBP|Low: £5,754 GBP|High: £11,621 GBP|Avg: £8,037 GBP|-13.4%

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

Retailer 21

November 1, 2026

Retailer 6£5,754 GBP

Retailer 8£5,785 GBP

Retailer 4£5,968 GBP

Retailer 20£6,069 GBP

Retailer 9£6,145 GBP

Retailer 18£6,333 GBP

Retailer 7£6,374 GBP

Retailer 5£6,794 GBP

Retailer 12£6,918 GBP

Retailer 17£7,081 GBP

Retailer 21£7,134 GBP

Retailer 2£7,396 GBP

Retailer 10£7,396 GBP

Retailer 3£7,642 GBP

Retailer 19£7,733 GBP

Retailer 16£7,946 GBP

Retailer 13£8,088 GBP

Retailer 11£8,171 GBP

Retailer 14£9,190 GBP

Retailer 15£9,364 GBP

Retailer 1£9,955 GBP

42 data points across 21 retailers

27 retailers£5,754 GBP to £15,244 GBP

Cheapest Retailer

£5,754 GBP

$7,710 USD

Retailer 2

£5,785 GBP

$7,751 USD

View

Retailer 3

£5,968 GBP

$7,996 USD

View

Retailer 4

£6,069 GBP

$8,132 USD

View

Retailer 5

£6,145 GBP

$8,234 USD

View

Retailer 6

£6,333 GBP

$8,485 USD

View

B+

Retailer 7

£6,374 GBP

$8,540 USD

View

Final sale: no returns

B+

Retailer 8

£6,794 GBP

$9,104 USD

View

B+

Retailer 9

£6,918 GBP

View

B+

Retailer 10

£7,081 GBP

$9,488 USD

View

B+

Retailer 11

£7,134 GBP

$9,558 USD

View

Retailer 12

£7,352 GBP

$9,851 USD

View

Price last confirmed 16 days ago

B+

Retailer 13

£7,396 GBP

$9,910 USD

View

B+

Retailer 14

£7,396 GBP

$9,910 USD

View

B+

Retailer 15

£7,642 GBP

$10,240 USD

View

B+

Retailer 16

£7,733 GBP

$10,362 USD

View

B+

Retailer 17

£7,946 GBP

€10,140 EUR

View

Retailer 18

£7,965 GBP

$10,672 USD

View

Price last confirmed 10 days ago

Retailer 19

£8,088 GBP

$10,837 USD

View

Price last confirmed 10 days ago

Retailer 20

£8,171 GBP

A$16,844 AUD

View

Price last confirmed 28 days ago

Retailer 21

£8,192 GBP

$10,976 USD

View

Price last confirmed 17 days ago

Retailer 22

£9,190 GBP

$12,314 USD

View

Price last confirmed 11 days ago

B+

Retailer 23

£9,364 GBP

ZAR 202,693 ZAR

View

Retailer 24

£9,955 GBP

View

Retailer 25

£12,254 GBP

$16,419 USD

View

Price last confirmed 12 days ago

Retailer 26

£14,543 GBP

View

Most Expensive

Diamond Quarter

1.51SI1D34607BA3N · Oct 31

£15,244 GBP

View

26 more retailers have this diamond

Prices start from £5,754 GBPSave up to £9,490 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.

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1.51ct Round

£5,754 GBP