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Round|Natural|GIA

1.51ct F SI2 Round Natural Diamond

EX • F/SI2 • GIA 1538258148

Certificate GIA 1538258148

Diamond specifications and retailer prices

From $6,466 AUD
HK$35,400 HKD
As of November 1, 2026
Save $7,198 AUD (53%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $14,112 AUD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1538258148. Listed at 21 retailers as of October 28, 2026, with a 111% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
F
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 1538258148
Dimensions7.35 × 7.29 × 4.59 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Cloud, Crystal, Feather, Needle
Top View
7.35 mm7.29 mm1.51 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1538258148
Side View
Table 58.0%Crown 35°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 62.7%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: $8,176 AUD|Low: $6,411 AUD|High: $13,718 AUD|Avg: $9,048 AUD|-0.6%
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
November 3, 2026
Retailer 10$6,466 AUD
Retailer 6$6,871 AUD
Retailer 13$7,367 AUD
Retailer 2$7,411 AUD
Retailer 11$7,570 AUD
Retailer 5$7,788 AUD
Retailer 1$8,176 AUD
Retailer 3$8,319 AUD
Retailer 4$8,659 AUD
Retailer 7$8,957 AUD
Retailer 8$9,178 AUD
Retailer 9$12,430 AUD
Retailer 12$13,664 AUD

31 data points across 13 retailers

21 retailers$6,466 AUD to $13,664 AUD

A
Cheapest Retailer
-
$6,466 AUD
HK$35,400 HKD
A
Retailer 2
-
$6,871 AUD
₹458,610 INR
View
A
Retailer 3
-
$7,367 AUD
SGD 6,977 SGD
View
A
Retailer 4
-
$7,411 AUD
$5,194 USD
View
A
Retailer 5
-
$7,570 AUD
$5,305 USD
View
Retailer 6
-
$7,644 AUD
$5,357 USD
View
Price last confirmed 18 days ago
Retailer 7
-
$7,644 AUD
$5,357 USD
View
Price last confirmed 35 days ago
Retailer 8
-
$7,644 AUD
$5,357 USD
View
Price last confirmed 34 days ago
A
Retailer 9
-
$7,788 AUD
$5,458 USD
View
Final sale: no returns
A
Retailer 10
-
$7,861 AUD
$5,509 USD
View
A
Retailer 11
-
$8,176 AUD
£4,512 GBP
View
A
Retailer 12
-
$8,319 AUD
$5,830 USD
View
A
Retailer 13
-
$8,659 AUD
$6,069 USD
View
Retailer 14
-
$8,820 AUD
$6,181 USD
View
Price last confirmed 34 days ago
A
Retailer 15
-
$8,957 AUD
£4,943 GBP
View
A
Retailer 16
-
$9,178 AUD
€6,126 EUR
View
Retailer 17
-
$9,305 AUD
$6,521 USD
View
Price last confirmed 11 days ago
B+
Retailer 18
-
$12,430 AUD
£6,859 GBP
View
B+
Retailer 19
-
$13,664 AUD
£7,540 GBP
View
Retailer 20
-
$14,112 AUD
$9,890 USD
View
Price last confirmed 36 days ago
Most Expensive
NZ Jewellers
f4f1a7a0-c163-4cbe-a534-8e0fa0e569e3 · Oct 17
$14,112 AUD
$9,890 USD
View
Price last confirmed 16 days ago
20 more retailers have this diamond
Prices start from $6,466 AUDSave up to $7,198 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
$6,466 AUD