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Oval|Natural|GIA

1.51ct K SI1 Oval Natural Diamond

GD • K/SI1 • GIA 6375880480

Certificate GIA 6375880480

Diamond specifications and retailer prices

From $6,503 AUD
As of November 6, 2026
Save $6,350 AUD (49%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $12,853 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural oval diamond

This 1.51ct natural oval sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6375880480. Listed at 17 retailers as of November 5, 2026, with prices from $6,503 to $12,853, a $6,350 spread on the same certified stone. NZ Jewellers lists it at $12,853. 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

1.51
Carat
K
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6375880480
Dimensions8.88 × 6.63 × 4.05 mm
L/W Ratio1.34
Top View
8.88 mm6.63 mm1.51 ctK / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6375880480
Side View
Table 60.0%CrownGirdle: THN-STKPavilionCulet: NoneDepth 61.1%

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 6
Current: $7,276 AUD|Low: $6,782 AUD|High: $12,087 AUD|Avg: $8,393 AUD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6$6,782 AUD
Retailer 2$6,820 AUD
Retailer 1$7,276 AUD
Retailer 7$7,685 AUD
Retailer 5$8,693 AUD
Retailer 3$9,376 AUD
Retailer 4$11,912 AUD

40 data points across 7 retailers

17 retailers$6,503 AUD to $12,853 AUD

B+
Cheapest Retailer
-
$6,503 AUD
B+
Retailer 2
-
$6,685 AUD
View
B+
Retailer 3
-
$6,701 AUD
View
Retailer 4
-
$6,782 AUD
View
Price last confirmed 16 days ago
B+
Retailer 5
-
$6,820 AUD
View
B
Retailer 6
-
$6,986 AUD
View
B
Retailer 7
-
$7,212 AUD
View
B
Retailer 8
-
$7,276 AUD
View
Retailer 9
-
$7,685 AUD
View
Price last confirmed 8 days ago
B
Retailer 10
-
$7,685 AUD
View
B
Retailer 11
-
$7,685 AUD
View
B
Retailer 12
-
$7,906 AUD
View
B
Retailer 13
-
$8,693 AUD
View
B
Retailer 14
-
$8,866 AUD
View
B
Retailer 15
-
$9,376 AUD
View
C
Retailer 16
-
$11,912 AUD
View
Most Expensive
C
NZ Jewellers
2ac61b3e-3814-4d03-9bf2-8ef5f5c05a53 · Nov 5
$12,853 AUD
$8,831 USD
View
16 more retailers have this diamond
Prices start from $6,503 AUDSave up to $6,350 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+
1.51ct Oval
$6,503 AUD