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Round|Natural|GIA

0.31ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 6551243520

Certificate GIA 6551243520

Diamond specifications and retailer prices

From $273 AUD
₹18,233 INR
As of November 1, 2026
Save $603 AUD (69%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,908 AUD at NZ Jewellers · As of September 28, 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 6551243520. Listed at 17 retailers as of November 1, 2026, with a 221% 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

0.31
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 6551243520
Dimensions4.33 × 4.32 × 2.70 mm
L/W Ratio1.00
Key to symbols
Crystal, Feather
Top View
4.33 mm4.32 mm0.31 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551243520
Side View
Table 58.0%Crown 34.5°Girdle: MED-STKPavilion 41.4°Culet: NDepth 62.5%

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: $656 AUD|Low: $273 AUD|High: $946 AUD|Avg: $518 AUD|-6.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 5$273 AUD
Retailer 4$328 AUD
Retailer 2$363 AUD
Retailer 3$413 AUD
Retailer 10$453 AUD
Retailer 9$454 AUD
Retailer 8$473 AUD
Retailer 6$564 AUD
Retailer 11$565 AUD
Retailer 12$595 AUD
Retailer 1$656 AUD
Retailer 7$875 AUD

24 data points across 12 retailers

17 retailers$273 AUD to $875 AUD

A
Cheapest Retailer
-
$273 AUD
₹18,233 INR
A
Retailer 2
-
$328 AUD
HK$1,800 HKD
View
A
Retailer 3
-
$363 AUD
$255 USD
View
A
Retailer 4
-
$413 AUD
SGD 392 SGD
View
Retailer 5
-
$417 AUD
$293 USD
View
Price last confirmed 32 days ago
A
Retailer 6
-
$453 AUD
$318 USD
View
A
Retailer 7
-
$454 AUD
View
Retailer 8
-
$470 AUD
$330 USD
View
Price last confirmed 33 days ago
A
Retailer 9
-
$473 AUD
£262 GBP
View
B+
Retailer 10
-
$564 AUD
$397 USD
View
B+
Retailer 11
-
$565 AUD
$397 USD
View
Retailer 12
-
$567 AUD
$398 USD
View
Price last confirmed 33 days ago
B+
Retailer 13
-
$595 AUD
ZAR 6,750 ZAR
View
B+
Retailer 14
-
$656 AUD
€439 EUR
View
Retailer 15
-
$669 AUD
View
Price last confirmed 29 days ago
B
Retailer 16
-
$875 AUD
£484 GBP
View
Most Expensive
NZ Jewellers
0c574757-2d77-4f02-acfd-fd6a4f526da0 · Sep 28
$1,908 AUD
$1,340 USD
View
Price under review
16 more retailers have this diamond
Prices start from $273 AUDSave up to $603 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
$273 AUD