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Round|Natural|GIA

1.33ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2554658620

Certificate GIA 2554658620

Diamond specifications and retailer prices

From £1,888 GBP
As of November 4, 2026
Save £2,389 GBP (56%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £4,277 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.33ct natural round diamond

This 1.33ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2554658620. Listed at 6 retailers as of November 4, 2026, with prices from £1,888 to £4,277, a £2,389 spread on the same certified stone. NZ Jewellers lists it at £4,277. 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

1.33
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2554658620
Dimensions7.10 × 7.06 × 4.28 mm
L/W Ratio1.01
Star length50%
Culet sizeNone
Key to symbols
Cloud, Feather, Needle
Top View
7.10 mm7.06 mm1.33 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2554658620
Side View
Table 60.0%Crown 32.5°Girdle: STK-STKPavilion 41°Culet: NoneDepth 60.4%

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 4
Current: £4,277 GBP|Low: £1,888 GBP|High: £4,277 GBP|Avg: £2,858 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 5£1,888 GBP
Retailer 6£1,984 GBP
Retailer 3£2,392 GBP
Retailer 2£2,410 GBP
Retailer 4£3,583 GBP
NZ Jewellers£4,277 GBP

22 data points across 6 retailers

6 retailers£1,888 GBP to £4,277 GBP

A
Cheapest Retailer
-
£1,888 GBP
Final sale: no returns
B+
Retailer 2
-
£1,984 GBP
View
B+
Retailer 3
-
£2,392 GBP
View
B+
Retailer 4
-
£2,410 GBP
View
B
Retailer 5
-
£3,583 GBP
View
Most Expensive
B
NZ Jewellers
f633a713-e111-4162-8048-10e89e15cc81 · Nov 5
£4,277 GBP
$5,756 USD
View
5 more retailers have this diamond
Prices start from £1,888 GBPSave up to £2,389 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
1.33ct Round
£1,888 GBP