Round|Natural|GIA

1.28ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2247034235

Certificate GIA 2247034235

Diamond specifications and retailer prices

From £2,649 GBP
As of November 5, 2026
Save £1,125 GBP (30%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £6,279 GBP at NZ Jewellers · As of September 27, 2026
View at NZ Jewellers

About this 1.28ct natural round diamond

This 1.28ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2247034235. Listed at 20 retailers as of November 5, 2026, with a 42% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.28
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2247034235
Dimensions6.92 × 6.88 × 4.35 mm
L/W Ratio1.01
Top View
6.92 mm6.88 mm1.28 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2247034235
Side View
Table 57.0%CrownGirdle: Sli. ThickPavilionCulet: NoneDepth 63.2%

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 5
Current: £3,774 GBP|Low: £2,530 GBP|High: £5,810 GBP|Avg: £3,492 GBP|+10.5%
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
November 6, 2026
Retailer 9£2,649 GBP
Retailer 16£2,763 GBP
Retailer 11£2,794 GBP
Retailer 7£2,873 GBP
Retailer 15£3,010 GBP
Retailer 5£3,097 GBP
Retailer 6£3,247 GBP
Retailer 13£3,344 GBP
Retailer 8£3,459 GBP
Retailer 12£3,459 GBP
Retailer 17£3,579 GBP
Retailer 2£3,652 GBP
Retailer 10£3,704 GBP
Retailer 1£3,774 GBP
Retailer 4£3,979 GBP
Retailer 3£4,346 GBP
Retailer 14£5,794 GBP

39 data points across 17 retailers

20 retailers£2,649 GBP to £3,774 GBP

A
Cheapest Retailer
-
£2,649 GBP
B+
Retailer 2
-
£2,794 GBP
View
B+
Retailer 3
-
£2,809 GBP
View
B+
Retailer 4
-
£2,921 GBP
View
B+
Retailer 5
-
£3,010 GBP
View
Retailer 6
-
£3,266 GBP
View
Price last confirmed 29 days ago
Retailer 7
-
£3,266 GBP
View
Price last confirmed 29 days ago
Retailer 8
-
£3,266 GBP
View
Price last confirmed 38 days ago
B+
Retailer 9
-
£3,344 GBP
View
B
Retailer 10
-
£3,459 GBP
View
B
Retailer 11
-
£3,459 GBP
View
B
Retailer 12
-
£3,579 GBP
View
Retailer 13
-
£3,652 GBP
View
Price last confirmed 33 days ago
B
Retailer 14
-
£3,704 GBP
View
Retailer 15
-
£3,768 GBP
View
Price last confirmed 38 days ago
B+
Retailer 16
-
£3,774 GBP
View
Retailer 17
-
£3,979 GBP
View
Price last confirmed 29 days ago
Retailer 18
-
£4,346 GBP
View
Price last confirmed 37 days ago
Retailer 19
-
£5,794 GBP
View
Price last confirmed 29 days ago
Most Expensive
NZ Jewellers
55f578f1-354a-4ea5-8be4-20ec29b3a72f · Sep 27
£6,279 GBP
$8,405 USD
View
Price last confirmed 40 days ago
19 more retailers have this diamond
Prices start from £2,649 GBPSave up to £1,125 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
1.28ct Round
£2,649 GBP