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Round|Natural|GIA

1.27ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 5553208216

Certificate GIA 5553208216

Diamond specifications and retailer prices

From £3,710 GBP
CA$6,905 CAD
As of October 30, 2026
Save £1,080 GBP (23%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £4,790 GBP at 77 Diamonds · As of November 2, 2026
View at 77 Diamonds

About this 1.27ct natural round diamond

This 1.27ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5553208216. Listed at 3 retailers as of October 30, 2026, with prices from £3,710 to £4,790, a £1,080 spread on the same certified stone. 77 Diamonds lists it at £4,790. 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

1.27
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 5553208216
Dimensions6.83 × 6.89 × 4.29 mm
L/W Ratio1.01
Key to symbols
Cloud, Crystal, Feather, Needle
Top View
6.83 mm6.89 mm1.27 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5553208216
Side View
Table 59.0%CrownGirdle: Slightly ThickPavilion 41°Culet: NoneDepth 62.5%

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: Oct 30
Current: £4,790 GBP|Low: £2,245 GBP|High: £6,105 GBP|Avg: £4,541 GBP|+4.6%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 11£2,245 GBP
Retailer 3£2,729 GBP
Retailer 4£3,710 GBP
Retailer 5£4,657 GBP
Retailer 7£4,657 GBP
Retailer 8£4,722 GBP
Retailer 2£4,776 GBP
77 Diamonds£4,790 GBP
Retailer 6£5,911 GBP
Retailer 10£5,911 GBP
Retailer 9£6,105 GBP

37 data points across 11 retailers

3 retailers£3,710 GBP to £4,790 GBP

B+
Cheapest Retailer
-
£3,710 GBP
CA$6,905 CAD
B
Retailer 2
-
£4,776 GBP
€6,094 EUR
View
Most Expensive
B
77 Diamonds
RBMBA8APGGYE · Nov 2
£4,790 GBP
View
2 more retailers have this diamond
Prices start from £3,710 GBPSave up to £1,080 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+
1.27ct Round
£3,710 GBP