CaratHunter
Plans
Round|Natural|GIA

1.27ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 5242051392

Certificate GIA 5242051392

Diamond specifications and retailer prices

From £1,089 GBP
HK$11,400 HKD
As of November 1, 2026
Save £2,537 GBP (70%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £3,626 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

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 J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5242051392. Listed at 8 retailers as of October 30, 2026, with prices from £1,089 to £3,626, a £2,537 spread on the same certified stone. NZ Jewellers lists it at £3,626. 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
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 5242051392
Dimensions6.84 × 6.89 × 4.31 mm
L/W Ratio1.01
Key to symbols
Crystal, Needle
Top View
6.84 mm6.89 mm1.27 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5242051392
Side View
Table 58.0%CrownGirdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.8%

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 1
Current: £3,626 GBP|Low: £1,079 GBP|High: £3,626 GBP|Avg: £2,018 GBP|+4.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 5£1,089 GBP
Retailer 2£1,430 GBP
Retailer 4£1,487 GBP
Retailer 7£1,590 GBP
Retailer 6£1,641 GBP
Retailer 3£1,999 GBP
Retailer 8£2,666 GBP
NZ Jewellers£3,626 GBP

42 data points across 8 retailers

8 retailers£1,089 GBP to £3,626 GBP

A
Cheapest Retailer
-
£1,089 GBP
HK$11,400 HKD
A
Retailer 2
-
£1,430 GBP
View
A
Retailer 3
-
£1,487 GBP
$1,992 USD
View
A
Retailer 4
-
£1,590 GBP
$2,130 USD
View
A
Retailer 5
-
£1,641 GBP
$2,199 USD
View
B+
Retailer 6
-
£1,999 GBP
€2,551 EUR
View
B+
Retailer 7
-
£2,666 GBP
View
Most Expensive
B
NZ Jewellers
cc0ead37-83b3-4bed-b6b1-2fefbdf3fea1 · Oct 30
£3,626 GBP
$4,858 USD
View
7 more retailers have this diamond
Prices start from £1,089 GBPSave up to £2,537 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
1.27ct Round
£1,089 GBP