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Round|Natural|GIA

0.31ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2566380050

Certificate GIA 2566380050

Diamond specifications and retailer prices

From £141 GBP
₹18,015 INR
As of October 30, 2026
Save £787 GBP (85%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £928 GBP at NZ Jewellers · As of October 26, 2026
View at NZ Jewellers

About this 0.31ct natural round diamond

This 0.31ct natural round sits in the sub-half-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2566380050. Listed at 16 retailers as of October 26, 2026, with prices from £141 to £928, a £787 spread on the same certified stone. NZ Jewellers lists it at £928. 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

0.31
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2566380050
Dimensions4.35 × 4.36 × 2.70 mm
L/W Ratio1.00
Key to symbols
Crystal
Top View
4.35 mm4.36 mm0.31 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566380050
Side View
Table 57.0%Crown 35.5°Girdle: NUL-NULPavilion 40.8°Culet: NoneDepth 61.9%

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 30
Current: £249 GBP|Low: £141 GBP|High: £482 GBP|Avg: £278 GBP|-29.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 11£141 GBP
Retailer 2£172 GBP
Retailer 9£200 GBP
Retailer 10£231 GBP
Retailer 8£233 GBP
Retailer 1£249 GBP
Retailer 5£295 GBP
Retailer 3£323 GBP
Retailer 4£335 GBP
Retailer 6£401 GBP
Retailer 7£457 GBP

12 data points across 11 retailers

16 retailers£141 GBP to £928 GBP

A
Cheapest Retailer
-
£141 GBP
₹18,015 INR
A
Retailer 2
-
£172 GBP
HK$1,800 HKD
View
A
Retailer 3
-
£198 GBP
$265 USD
View
A
Retailer 4
-
£200 GBP
$268 USD
View
Retailer 5
-
£225 GBP
$301 USD
View
Price last confirmed 7 days ago
A
Retailer 6
-
£231 GBP
$310 USD
View
Retailer 7
-
£233 GBP
$312 USD
View
Price last confirmed 7 days ago
A
Retailer 8
-
£233 GBP
A$481 AUD
View
A
Retailer 9
-
£249 GBP
View
A
Retailer 10
-
£276 GBP
$370 USD
View
B+
Retailer 11
-
£295 GBP
$396 USD
View
Retailer 12
-
£323 GBP
ZAR 6,983 ZAR
View
Price last confirmed 7 days ago
B+
Retailer 13
-
£335 GBP
€427 EUR
View
B+
Retailer 14
-
£401 GBP
View
B
Retailer 15
-
£457 GBP
View
Most Expensive
B
NZ Jewellers
461b3ca3-9f40-4479-821e-e2dd38bfa610 · Oct 26
£928 GBP
$1,244 USD
View
15 more retailers have this diamond
Prices start from £141 GBPSave up to £787 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
0.31ct Round
£141 GBP