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1.55ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 2516731507

Certificate GIA 2516731507

Diamond specifications and retailer prices

From £1,712 GBP
As of November 6, 2026
Save £1,766 GBP (51%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £3,477 GBP at Wholesale Diamonds Direct · As of November 3, 2026
View at Wholesale Diamonds Direct

About this 1.55ct natural round diamond

This 1.55ct natural round sits in the one-and-a-half to two carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2516731507. Listed at 8 retailers as of November 3, 2026, with prices from £1,712 to £3,477, a £1,766 spread on the same certified stone. Wholesale Diamonds Direct lists it at £3,477. 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

1.55
Carat
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2516731507
Dimensions7.37 × 7.34 × 4.58 mm
L/W Ratio1.00
Top View
7.37 mm7.34 mm1.55 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2516731507
Side View
Table 58.0%Crown 36°Girdle: Slightly ThickPavilion 40.6°Culet: NoneDepth 62.3%

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: Nov 6
Current: £1,712 GBP|Low: £1,693 GBP|High: £3,743 GBP|Avg: £2,405 GBP|-10.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Wholesale Diamonds Direct
November 4, 2026
Retailer 1£1,712 GBP
Retailer 2£1,904 GBP
Retailer 5£1,961 GBP
Retailer 6£2,025 GBP
Retailer 3£2,106 GBP
Retailer 8£2,332 GBP
Retailer 7£2,658 GBP
Retailer 4£2,797 GBP
Wholesale Diamonds Direct£3,477 GBP

23 data points across 9 retailers

8 retailers£1,712 GBP to £3,477 GBP

A
Cheapest Retailer
-
£1,712 GBP
A
Retailer 2
-
£1,904 GBP
View
Final sale: no returns
B+
Retailer 3
-
£1,961 GBP
View
A
Retailer 4
-
£2,025 GBP
View
A
Retailer 5
-
£2,106 GBP
View
B+
Retailer 6
-
£2,332 GBP
View
B
Retailer 7
-
£2,797 GBP
View
Most Expensive
B
Wholesale Diamonds Direct
625924145 · Nov 3
£3,477 GBP
$4,680 USD
View
7 more retailers have this diamond
Prices start from £1,712 GBPSave up to £1,766 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
1.55ct Round
£1,712 GBP