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Round|Natural|GIA

1.51ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 5181599972

Certificate GIA 5181599972

Diamond specifications and retailer prices

From $14,727 AUD
$10,345 USD
As of November 1, 2026
Save $15,525 AUD (51%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $30,252 AUD at Diamond Quarter · As of October 31, 2026
View at Diamond Quarter

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5181599972. Listed at 20 retailers as of October 31, 2026, with prices from $14,727 to $30,252, a $15,525 spread on the same certified stone. Diamond Quarter lists it at $30,252. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5181599972
Dimensions7.40 × 7.37 × 4.50 mm
L/W Ratio1.00
Top View
7.40 mm7.37 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5181599972
Side View
Table 59.0%CrownGirdle: THN-STKPavilionCulet: NoneDepth 60.9%

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 1
Current: $17,869 AUD|Low: $13,863 AUD|High: $27,726 AUD|Avg: $18,975 AUD|-4.8%
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 2, 2026
Retailer 16$14,727 AUD
Retailer 13$15,173 AUD
Retailer 10$15,435 AUD
Retailer 3$15,793 AUD
Retailer 11$16,393 AUD
Retailer 6$16,636 AUD
Retailer 19$16,636 AUD
Retailer 1$17,869 AUD
Retailer 8$18,021 AUD
Retailer 15$18,100 AUD
Retailer 2$18,299 AUD
Retailer 7$19,254 AUD
Retailer 5$19,290 AUD
Retailer 17$19,290 AUD
Retailer 20$19,930 AUD
Retailer 18$19,996 AUD
Retailer 4$20,795 AUD
Retailer 14$24,440 AUD
Retailer 12$25,981 AUD
Retailer 9$27,726 AUD

44 data points across 20 retailers

20 retailers$14,727 AUD to $30,252 AUD

B+
Cheapest Retailer
-
$14,727 AUD
$10,345 USD
B+
Retailer 2
-
$15,173 AUD
$10,658 USD
View
B
Retailer 3
-
$15,435 AUD
$10,842 USD
View
B
Retailer 4
-
$15,793 AUD
CA$15,408 CAD
View
B
Retailer 5
-
$16,393 AUD
$11,515 USD
View
B
Retailer 6
-
$16,636 AUD
$11,686 USD
View
B
Retailer 7
-
$16,636 AUD
$11,686 USD
View
Final sale: no returns
B
Retailer 8
-
$17,869 AUD
£9,883 GBP
View
B
Retailer 9
-
$18,021 AUD
$12,659 USD
View
Retailer 10
-
$18,100 AUD
View
Price last confirmed 9 days ago
B
Retailer 11
-
$18,299 AUD
$12,854 USD
View
B
Retailer 12
-
$19,254 AUD
$13,525 USD
View
B
Retailer 13
-
$19,290 AUD
$13,550 USD
View
B
Retailer 14
-
$19,290 AUD
$13,550 USD
View
B
Retailer 15
-
$19,930 AUD
$14,000 USD
View
B
Retailer 16
-
$20,795 AUD
$14,607 USD
View
B
Retailer 17
-
$24,440 AUD
ZAR 277,346 ZAR
View
B
Retailer 18
-
$25,981 AUD
£14,370 GBP
View
B
Retailer 19
-
$27,726 AUD
$19,476 USD
View
Most Expensive
B
Diamond Quarter
1.51SI1G517287D1N · Oct 31
$30,252 AUD
£16,732 GBP
View
19 more retailers have this diamond
Prices start from $14,727 AUDSave up to $15,525 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 Round
$14,727 AUD