CaratHunter
Plans
Oval|Natural|GIA

0.51ct D VS1 Oval Natural Diamond

GD • D/VS1 • GIA 1509440320

Certificate GIA 1509440320

Diamond specifications and retailer prices

From $1,594 AUD
$1,120 USD
As of October 28, 2026
Save $2,022 AUD (56%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $4,790 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.51ct natural oval diamond

This 0.51ct natural oval sits in the half to three-quarter carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1509440320. Listed at 23 retailers as of October 28, 2026, with a 127% 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
D
Colour
VS1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1509440320
Dimensions6.55 × 4.61 × 2.64 mm
L/W Ratio1.42
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Needle, Feather
Top View
6.55 mm4.61 mm0.51 ctD / VS1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1509440320
Side View
Table 61.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 57.2%

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: Oct 28
Current: $2,189 AUD|Low: $1,594 AUD|High: $3,641 AUD|Avg: $2,501 AUD|+4.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 6$1,594 AUD
Retailer 8$1,641 AUD
Retailer 10$1,780 AUD
Retailer 7$1,950 AUD
Retailer 1$2,189 AUD
Retailer 4$2,546 AUD
Retailer 9$2,563 AUD
Retailer 5$3,024 AUD
Retailer 2$3,536 AUD
Retailer 3$3,616 AUD

42 data points across 10 retailers

23 retailers$1,594 AUD to $3,616 AUD

B+
Cheapest Retailer
-
$1,594 AUD
$1,120 USD
B+
Retailer 2
-
$1,641 AUD
$1,153 USD
View
Final sale: no returns
B+
Retailer 3
-
$1,704 AUD
$1,197 USD
View
B+
Retailer 4
-
$1,723 AUD
$1,210 USD
View
B+
Retailer 5
-
$1,747 AUD
$1,227 USD
View
B+
Retailer 6
-
$1,780 AUD
$1,250 USD
View
B+
Retailer 7
-
$1,780 AUD
$1,250 USD
View
B
Retailer 8
-
$1,848 AUD
$1,298 USD
View
B
Retailer 9
-
$1,950 AUD
$1,370 USD
View
B
Retailer 10
-
$2,053 AUD
$1,442 USD
View
B
Retailer 11
-
$2,135 AUD
$1,500 USD
View
B
Retailer 12
-
$2,135 AUD
$1,500 USD
View
B
Retailer 13
-
$2,189 AUD
£1,211 GBP
View
B
Retailer 14
-
$2,207 AUD
$1,550 USD
View
B
Retailer 15
-
$2,227 AUD
$1,564 USD
View
B
Retailer 16
-
$2,465 AUD
$1,732 USD
View
B
Retailer 17
-
$2,546 AUD
€1,703 EUR
View
Retailer 18
-
$2,563 AUD
View
Price last confirmed 25 days ago
B
Retailer 19
-
$3,024 AUD
ZAR 34,318 ZAR
View
B
Retailer 20
-
$3,206 AUD
CA$3,128 CAD
View
B
Retailer 21
-
$3,536 AUD
£1,956 GBP
View
B
Retailer 22
-
$3,616 AUD
£2,000 GBP
View
Most Expensive
NZ Jewellers
9b8e3c4d-435d-4935-919f-5de14ed1b4db · Oct 30
$4,790 AUD
$3,365 USD
View
Price under review
22 more retailers have this diamond
Prices start from $1,594 AUDSave up to $2,022 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 Oval
$1,594 AUD