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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 $269 AUD
₹18,015 INR
As of October 30, 2026
Save $1,502 AUD (85%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,771 AUD 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 $269 to $1,771, a $1,502 spread on the same certified stone. NZ Jewellers lists it at $1,771. 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: $475 AUD|Low: $269 AUD|High: $920 AUD|Avg: $530 AUD|-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$269 AUD
Retailer 2$328 AUD
Retailer 9$382 AUD
Retailer 10$441 AUD
Retailer 8$445 AUD
Retailer 1$475 AUD
Retailer 5$564 AUD
Retailer 3$615 AUD
Retailer 4$638 AUD
Retailer 6$764 AUD
Retailer 7$871 AUD

12 data points across 11 retailers

16 retailers$269 AUD to $1,771 AUD

A
Cheapest Retailer
-
$269 AUD
₹18,015 INR
A
Retailer 2
-
$328 AUD
HK$1,800 HKD
View
A
Retailer 3
-
$377 AUD
$265 USD
View
A
Retailer 4
-
$382 AUD
$268 USD
View
Retailer 5
-
$429 AUD
$301 USD
View
Price last confirmed 7 days ago
A
Retailer 6
-
$441 AUD
$310 USD
View
Retailer 7
-
$444 AUD
$312 USD
View
Price last confirmed 8 days ago
A
Retailer 8
-
$445 AUD
View
A
Retailer 9
-
$475 AUD
£263 GBP
View
A
Retailer 10
-
$527 AUD
$370 USD
View
B+
Retailer 11
-
$564 AUD
$396 USD
View
Retailer 12
-
$615 AUD
ZAR 6,983 ZAR
View
Price last confirmed 7 days ago
B+
Retailer 13
-
$638 AUD
€427 EUR
View
B+
Retailer 14
-
$764 AUD
£423 GBP
View
B
Retailer 15
-
$871 AUD
£482 GBP
View
Most Expensive
B
NZ Jewellers
461b3ca3-9f40-4479-821e-e2dd38bfa610 · Oct 26
$1,771 AUD
$1,244 USD
View
15 more retailers have this diamond
Prices start from $269 AUDSave up to $1,502 AUD

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
$269 AUD