CaratHunter
Plans
Round|Natural|GIA

1.27ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 2554428338

Certificate GIA 2554428338

Diamond specifications and retailer prices

From £3,704 GBP
$4,970 USD
As of November 1, 2026
Save £2,438 GBP (40%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £6,141 GBP at MOH London · As of November 2, 2026
View at MOH London

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 2554428338. Listed at 9 retailers as of November 1, 2026, with prices from £3,704 to £6,141, a £2,438 spread on the same certified stone. MOH London lists it at £6,141. 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
FluorescenceNone
Crown angle34.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 2554428338
Dimensions6.90 × 6.96 × 4.34 mm
L/W Ratio1.01
Culet sizeNone
Top View
6.90 mm6.96 mm1.27 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2554428338
Side View
Table 58.0%Crown 34.5°Girdle: MediumPavilion 41.8°Culet: NoneDepth 62.6%

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: £6,141 GBP|Low: £2,769 GBP|High: £6,401 GBP|Avg: £4,205 GBP|+0.6%
MOH London
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
November 2, 2026
Retailer 12£2,990 GBP
Retailer 3£3,096 GBP
Retailer 14£3,651 GBP
Retailer 13£3,700 GBP
Retailer 11£3,704 GBP
Retailer 7£3,813 GBP
Retailer 4£3,827 GBP
Retailer 2£3,950 GBP
Retailer 9£4,064 GBP
Retailer 8£4,204 GBP
Retailer 6£4,416 GBP
Retailer 10£4,856 GBP
MOH London£6,141 GBP
Retailer 5£6,401 GBP

24 data points across 14 retailers

9 retailers£3,704 GBP to £6,141 GBP

Retailer 1
-
£3,700 GBP
A$7,639 AUD
Price last confirmed 29 days ago
B+
Retailer 2
-
£3,704 GBP
$4,970 USD
View
B+
Retailer 3
-
£3,813 GBP
View
B+
Retailer 4
-
£3,950 GBP
$5,301 USD
View
B+
Retailer 5
-
£4,064 GBP
$5,454 USD
View
B+
Retailer 6
-
£4,204 GBP
€5,373 EUR
View
Retailer 7
-
£4,416 GBP
$5,926 USD
View
Price last confirmed 41 days ago
B
Retailer 8
-
£4,856 GBP
ZAR 105,271 ZAR
View
Most Expensive
B
MOH London
A5D378394 · Nov 2
£6,141 GBP
View
8 more retailers have this diamond
Prices start from £3,704 GBPSave up to £2,438 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
£3,704 GBP