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Round|Natural|GIA

0.37ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 2566400203

Certificate GIA 2566400203

Diamond specifications and retailer prices

From $429 AUD
$301 USD
As of October 27, 2026
Save $1,241 AUD (74%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,670 AUD at NZ Jewellers · As of October 26, 2026
View at NZ Jewellers

About this 0.37ct natural round diamond

This 0.37ct natural round sits in the sub-half-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2566400203. Listed at 12 retailers as of October 26, 2026, with prices from $429 to $1,670, a $1,241 spread on the same certified stone. NZ Jewellers lists it at $1,670. 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

0.37
Carat
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2566400203
Dimensions4.57 × 4.61 × 2.86 mm
L/W Ratio1.01
Key to symbols
Crystal, Feather
Top View
4.57 mm4.61 mm0.37 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2566400203
Side View
Table 58.0%Crown 36.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.4%

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: Oct 27
Current: $1,670 AUD|Low: $429 AUD|High: $1,670 AUD|Avg: $705 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 28, 2026
Retailer 7$429 AUD
Retailer 10$436 AUD
Retailer 12$448 AUD
Retailer 8$470 AUD
Retailer 9$485 AUD
Retailer 6$553 AUD
Retailer 11$587 AUD
Retailer 4$717 AUD
Retailer 2$822 AUD
Retailer 5$901 AUD
Retailer 3$1,011 AUD
NZ Jewellers$1,670 AUD

25 data points across 12 retailers

12 retailers$429 AUD to $1,670 AUD

A
Cheapest Retailer
-
$429 AUD
$301 USD
A
Retailer 2
-
$436 AUD
$306 USD
View
Retailer 3
-
$448 AUD
$315 USD
View
Price last confirmed 11 days ago
Retailer 4
-
$470 AUD
$330 USD
View
Price last confirmed 7 days ago
Retailer 5
-
$485 AUD
$341 USD
View
Price last confirmed 7 days ago
A
Retailer 6
-
$553 AUD
£306 GBP
View
A
Retailer 7
-
$587 AUD
$412 USD
View
B+
Retailer 8
-
$717 AUD
$504 USD
View
B+
Retailer 9
-
$822 AUD
€550 EUR
View
B+
Retailer 10
-
$901 AUD
£498 GBP
View
Retailer 11
-
$1,011 AUD
£559 GBP
View
Price last confirmed 14 days ago
Most Expensive
B
NZ Jewellers
5338cdf2-69da-4b77-8b26-a82cba24c11f · Oct 26
$1,670 AUD
$1,173 USD
View
11 more retailers have this diamond
Prices start from $429 AUDSave up to $1,241 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
0.37ct Round
$429 AUD