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Round|Natural|GIA

1.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 5546985835

Certificate GIA 5546985835

Diamond specifications and retailer prices

From £1,710 GBP
As of November 6, 2026
Save £4,708 GBP (73%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £6,417 GBP at Wholesale Diamonds Direct · As of November 4, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5546985835. Listed at 18 retailers as of November 4, 2026, with prices from £1,710 to £6,417, a £4,708 spread on the same certified stone. Wholesale Diamonds Direct lists it at £6,417. 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 5546985835
Dimensions7.27 × 7.32 × 4.58 mm
L/W Ratio1.01
Top View
7.27 mm7.32 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5546985835
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 63.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,710 GBP|Low: £1,710 GBP|High: £3,944 GBP|Avg: £2,492 GBP|-2.7%
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
November 6, 2026
Retailer 1£1,710 GBP
Retailer 13£2,028 GBP
Retailer 12£2,028 GBP
Retailer 3£2,169 GBP
Retailer 2£2,264 GBP
Retailer 4£2,264 GBP
Retailer 7£2,264 GBP
Retailer 5£2,351 GBP
Retailer 8£2,368 GBP
Retailer 6£2,369 GBP
Retailer 9£2,477 GBP
Retailer 15£2,612 GBP
Retailer 10£2,762 GBP
Retailer 11£3,775 GBP
Retailer 14£3,944 GBP

32 data points across 15 retailers

18 retailers£1,710 GBP to £6,417 GBP

A
Cheapest Retailer
-
£1,710 GBP
A
Retailer 2
-
£2,028 GBP
View
A
Retailer 3
-
£2,028 GBP
View
A
Retailer 4
-
£2,169 GBP
View
Retailer 5
-
£2,245 GBP
View
Price last confirmed 60 days ago
A
Retailer 6
-
£2,264 GBP
View
Retailer 7
-
£2,264 GBP
View
Price last confirmed 12 days ago
A
Retailer 8
-
£2,264 GBP
View
A
Retailer 9
-
£2,351 GBP
View
A
Retailer 10
-
£2,368 GBP
View
A
Retailer 11
-
£2,369 GBP
View
A
Retailer 12
-
£2,477 GBP
View
Retailer 13
-
£2,589 GBP
View
Price last confirmed 60 days ago
A
Retailer 14
-
£2,612 GBP
View
A
Retailer 15
-
£2,762 GBP
View
B+
Retailer 16
-
£3,775 GBP
View
B
Retailer 17
-
£3,944 GBP
View
Most Expensive
B
Wholesale Diamonds Direct
44512617 · Nov 4
£6,417 GBP
$8,637 USD
View
17 more retailers have this diamond
Prices start from £1,710 GBPSave up to £4,708 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
£1,710 GBP