Round|Natural|GIA

1.30ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 5556390031

Certificate GIA 5556390031

Diamond specifications and retailer prices

From £2,563 GBP
$3,413 USD
As of October 28, 2026
Save £3,242 GBP (56%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £6,031 GBP at NZ Jewellers · As of September 10, 2026
View at NZ Jewellers

About this 1.3ct natural round diamond

This 1.3ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5556390031. Listed at 25 retailers as of October 27, 2026, with a 127% 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

1.30
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle31.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 5556390031
Dimensions7.03 × 7.07 × 4.32 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Feather, Crystal, Needle
Top View
7.03 mm7.07 mm1.30 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 5556390031
Side View
Table 59.0%Crown 31.5°Girdle: THN-STKPavilion 41.8°Culet: NoneDepth 61.2%

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: Oct 28
Current: £5,805 GBP|Low: £2,277 GBP|High: £5,805 GBP|Avg: £3,417 GBP
NZ Jewellers
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
Retailer 18
Retailer 19
Retailer 20
Retailer 21
October 29, 2026
Retailer 9£2,563 GBP
Retailer 8£2,581 GBP
Retailer 6£2,603 GBP
Retailer 16£2,629 GBP
Retailer 5£2,657 GBP
Retailer 7£2,786 GBP
Retailer 19£2,880 GBP
Retailer 3£3,019 GBP
Retailer 12£3,019 GBP
Retailer 18£3,019 GBP
Retailer 11£3,067 GBP
Retailer 10£3,224 GBP
Retailer 21£3,286 GBP
Retailer 13£3,367 GBP
Retailer 4£3,484 GBP
Retailer 14£3,490 GBP
Retailer 2£3,705 GBP
Retailer 15£4,058 GBP
Retailer 20£4,819 GBP
Retailer 17£5,336 GBP
NZ Jewellers£5,805 GBP

36 data points across 21 retailers

25 retailers£2,563 GBP to £5,805 GBP

A
Cheapest Retailer
-
£2,563 GBP
$3,413 USD
A
Retailer 2
-
£2,581 GBP
$3,437 USD
View
A
Retailer 3
-
£2,603 GBP
$3,467 USD
View
A
Retailer 4
-
£2,629 GBP
$3,500 USD
View
A
Retailer 5
-
£2,657 GBP
$3,538 USD
View
A
Retailer 6
-
£2,762 GBP
A$5,658 AUD
View
A
Retailer 7
-
£2,786 GBP
$3,710 USD
View
Final sale: no returns
A
Retailer 8
-
£2,880 GBP
$3,835 USD
View
A
Retailer 9
-
£3,019 GBP
$4,020 USD
View
A
Retailer 10
-
£3,019 GBP
$4,020 USD
View
A
Retailer 11
-
£3,019 GBP
$4,020 USD
View
Retailer 12
-
£3,067 GBP
$4,084 USD
View
Price last confirmed 7 days ago
Retailer 13
-
£3,137 GBP
$4,177 USD
View
Price last confirmed 49 days ago
A
Retailer 14
-
£3,224 GBP
$4,294 USD
View
A
Retailer 15
-
£3,286 GBP
$4,376 USD
View
A
Retailer 16
-
£3,367 GBP
View
A
Retailer 17
-
£3,484 GBP
$4,639 USD
View
Retailer 18
-
£3,490 GBP
A$7,151 AUD
View
Price last confirmed 20 days ago
Retailer 19
-
£3,619 GBP
$4,819 USD
View
Price last confirmed 49 days ago
A
Retailer 20
-
£3,705 GBP
€4,699 EUR
View
B+
Retailer 21
-
£4,058 GBP
ZAR 87,297 ZAR
View
B+
Retailer 22
-
£4,819 GBP
$6,418 USD
View
Retailer 23
-
£5,336 GBP
View
Price last confirmed 12 days ago
B
Retailer 24
-
£5,805 GBP
$7,731 USD
View
Most Expensive
NZ Jewellers
e517ba02-28b9-4889-ae77-714b4f2529f1 · Sep 10
£6,031 GBP
$8,032 USD
View
Price last confirmed 49 days ago
24 more retailers have this diamond
Prices start from £2,563 GBPSave up to £3,242 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
1.30ct Round
£2,563 GBP