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Round|Natural|GIA

1.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6565157448

Certificate GIA 6565157448

Diamond specifications and retailer prices

From $7,181 AUD
As of November 1, 2026
Save $5,050 AUD (41%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $13,186 AUD at Wholesale Diamonds Direct · As of October 26, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6565157448. Listed at 10 retailers as of November 1, 2026, with a 70% 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6565157448
Dimensions7.31 × 4.55 × 4.55 mm
L/W Ratio1.61
Culet sizeNone
Top View
7.31 mm4.55 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6565157448
Side View
Table 59.0%Crown 33.5°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 62.0%

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: $7,428 AUD|Low: $7,181 AUD|High: $14,593 AUD|Avg: $9,320 AUD|-9.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Wholesale Diamonds Direct
November 5, 2026
Retailer 6$7,181 AUD
Retailer 1$7,428 AUD
Retailer 4$7,680 AUD
Retailer 5$7,914 AUD
Retailer 2$8,066 AUD
Retailer 7$8,558 AUD
Retailer 9$9,022 AUD
Retailer 3$9,333 AUD
Retailer 8$12,231 AUD
Wholesale Diamonds Direct$13,186 AUD

36 data points across 10 retailers

10 retailers$7,181 AUD to $12,231 AUD

A
Cheapest Retailer
-
$7,181 AUD
A
Retailer 2
-
$7,428 AUD
View
A
Retailer 3
-
$7,680 AUD
View
A
Retailer 4
-
$7,914 AUD
View
A
Retailer 5
-
$8,066 AUD
View
A
Retailer 6
-
$8,558 AUD
View
B+
Retailer 7
-
$9,022 AUD
View
B+
Retailer 8
-
$9,333 AUD
View
B
Retailer 9
-
$12,231 AUD
View
Most Expensive
Wholesale Diamonds Direct
299902968 · Oct 26
$13,186 AUD
$9,060 USD
View
Price last confirmed 11 days ago
9 more retailers have this diamond
Prices start from $7,181 AUDSave up to $5,050 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
$7,181 AUD