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Round|Natural|GIA

0.51ct K I1 Round Natural Diamond

GD • K/I1 • GIA 1215571727

Certificate GIA 1215571727

Diamond specifications and retailer prices

From $629 AUD
As of November 5, 2026
Save $407 AUD (39%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $2,658 AUD at NZ Jewellers · As of November 4, 2026
View at NZ Jewellers

About this 0.51ct natural round diamond

This 0.51ct natural round sits in the half to three-quarter carat band, graded K colour (faint-tinted) and I1 clarity (included), with a standard cut grade and certified by GIA 1215571727. Listed at 6 retailers as of November 5, 2026, with a 65% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
K
Colour
I1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1215571727
Dimensions4.94 × 4.96 × 3.20 mm
L/W Ratio1.00
Star length55%
Lower girdle80%
Top View
4.94 mm4.96 mm0.51 ctK / I1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1215571727
Side View
Table 60.0%Crown 38.5°Girdle: STK-VTKPavilion 40.6°Culet: NoneDepth 64.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $2,658 AUD|Low: $629 AUD|High: $2,658 AUD|Avg: $1,020 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 5$629 AUD
Retailer 3$677 AUD
Retailer 7$677 AUD
Retailer 6$724 AUD
Retailer 4$767 AUD
Retailer 8$881 AUD
Retailer 2$1,036 AUD
Retailer 9$1,041 AUD
NZ Jewellers$2,658 AUD

22 data points across 9 retailers

6 retailers$629 AUD to $1,036 AUD

B+
Cheapest Retailer
-
$629 AUD
Retailer 2
-
$677 AUD
View
Price last confirmed 8 days ago
B
Retailer 3
-
$677 AUD
View
B
Retailer 4
-
$724 AUD
View
B
Retailer 5
-
$1,036 AUD
View
Most Expensive
NZ Jewellers
9177e7d1-9e29-46a6-8241-062d0df65cb9 · Nov 4
$2,658 AUD
$1,861 USD
View
Price under review
5 more retailers have this diamond
Prices start from $629 AUDSave up to $407 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.

B+
0.51ct Round
$629 AUD