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Oval|Natural|GIA

1.51ct K SI1 Oval Natural Diamond

EX • K/SI1 • GIA 7543674333

Certificate GIA 7543674333

Diamond specifications and retailer prices

From $3,800 AUD
As of November 6, 2026
Save $5,075 AUD (57%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $8,875 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7543674333. Listed at 16 retailers as of November 5, 2026, with prices from $3,800 to $8,875, a $5,075 spread on the same certified stone. NZ Jewellers lists it at $8,875. 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

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

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 7543674333
Dimensions9.06 × 6.35 × 4.01 mm
L/W Ratio1.43
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cloud, Needle
Top View
9.06 mm6.35 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 7543674333
Side View
Table 58.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 63.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $4,941 AUD|Low: $3,800 AUD|High: $8,620 AUD|Avg: $6,073 AUD|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6$3,800 AUD
Retailer 1$4,941 AUD
Retailer 3$5,271 AUD
Retailer 2$5,931 AUD
Retailer 4$6,217 AUD
Retailer 5$8,494 AUD

37 data points across 6 retailers

16 retailers$3,800 AUD to $8,875 AUD

A
Cheapest Retailer
-
$3,800 AUD
A
Retailer 2
-
$4,349 AUD
View
A
Retailer 3
-
$4,522 AUD
View
A
Retailer 4
-
$4,905 AUD
View
A
Retailer 5
-
$4,941 AUD
View
Retailer 6
-
$5,094 AUD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$5,094 AUD
View
A
Retailer 8
-
$5,271 AUD
View
Retailer 9
-
$5,289 AUD
View
Price last confirmed 10 days ago
B+
Retailer 10
-
$5,290 AUD
View
B+
Retailer 11
-
$5,439 AUD
View
B+
Retailer 12
-
$5,877 AUD
View
B+
Retailer 13
-
$5,931 AUD
View
B+
Retailer 14
-
$6,217 AUD
View
B
Retailer 15
-
$8,494 AUD
View
Most Expensive
B
NZ Jewellers
a167fbd1-0cc6-498b-b95c-4f6b8a2bffc5 · Nov 5
$8,875 AUD
$6,098 USD
View
15 more retailers have this diamond
Prices start from $3,800 AUDSave up to $5,075 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
1.51ct Oval
$3,800 AUD