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Round|Natural|GIA

1.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 5546985835

Certificate GIA 5546985835

Diamond specifications and retailer prices

From $3,287 AUD
As of November 6, 2026
Save $9,051 AUD (73%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $12,338 AUD at Wholesale Diamonds Direct · As of November 6, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural round diamond

This 1.51ct natural round 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 and certified by GIA 5546985835. Listed at 18 retailers as of November 6, 2026, with prices from $3,287 to $12,338, a $9,051 spread on the same certified stone. Wholesale Diamonds Direct lists it at $12,338. 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

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 5546985835
Dimensions7.27 × 7.32 × 4.58 mm
L/W Ratio1.01
Top View
7.27 mm7.32 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5546985835
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 63.3%

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: $3,287 AUD|Low: $3,287 AUD|High: $7,582 AUD|Avg: $4,791 AUD|-2.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 1$3,287 AUD
Retailer 13$3,898 AUD
Retailer 12$3,900 AUD
Retailer 3$4,170 AUD
Retailer 2$4,353 AUD
Retailer 4$4,353 AUD
Retailer 7$4,353 AUD
Retailer 5$4,520 AUD
Retailer 8$4,553 AUD
Retailer 6$4,555 AUD
Retailer 9$4,763 AUD
Retailer 15$5,021 AUD
Retailer 10$5,311 AUD
Retailer 11$7,258 AUD
Retailer 14$7,582 AUD

32 data points across 15 retailers

18 retailers$3,287 AUD to $12,338 AUD

A
Cheapest Retailer
-
$3,287 AUD
A
Retailer 2
-
$3,898 AUD
View
A
Retailer 3
-
$3,900 AUD
View
A
Retailer 4
-
$4,170 AUD
View
Retailer 5
-
$4,315 AUD
View
Price last confirmed 60 days ago
A
Retailer 6
-
$4,353 AUD
View
Retailer 7
-
$4,353 AUD
View
Price last confirmed 12 days ago
A
Retailer 8
-
$4,353 AUD
View
A
Retailer 9
-
$4,520 AUD
View
A
Retailer 10
-
$4,553 AUD
View
A
Retailer 11
-
$4,555 AUD
View
A
Retailer 12
-
$4,763 AUD
View
Retailer 13
-
$4,978 AUD
View
Price last confirmed 60 days ago
A
Retailer 14
-
$5,021 AUD
View
A
Retailer 15
-
$5,311 AUD
View
B+
Retailer 16
-
$7,258 AUD
View
B
Retailer 17
-
$7,582 AUD
View
Most Expensive
B
Wholesale Diamonds Direct
44512617 · Nov 6
$12,338 AUD
$8,637 USD
View
17 more retailers have this diamond
Prices start from $3,287 AUDSave up to $9,051 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 Round
$3,287 AUD