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Round|Natural|GIA

1.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 7481667514

Certificate GIA 7481667514

Diamond specifications and retailer prices

From $9,667 AUD
$6,775 USD
As of November 1, 2026
Save $11,278 AUD (54%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $20,945 AUD at NZ Jewellers · As of November 2, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7481667514. Listed at 18 retailers as of November 1, 2026, with prices from $9,667 to $20,945, a $11,278 spread on the same certified stone. NZ Jewellers lists it at $20,945. 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
FluorescenceMedium
Crown angle35°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 7481667514
Dimensions7.35 × 7.30 × 4.53 mm
L/W Ratio1.01
Star length55%
Lower girdle80%
Girdle conditionFaceted
Culet sizeNone
Cert comments
Pinpoints are not shown.
Top View
7.35 mm7.30 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 7481667514
Side View
Table 58.0%Crown 35°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.9%

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: $12,927 AUD|Low: $9,667 AUD|High: $17,663 AUD|Avg: $12,699 AUD|+2.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 8$9,667 AUD
Retailer 7$9,806 AUD
Retailer 9$10,459 AUD
Retailer 2$11,519 AUD
Retailer 3$11,592 AUD
Retailer 6$11,860 AUD
Retailer 1$12,927 AUD
Retailer 10$14,046 AUD
Retailer 4$15,385 AUD
Retailer 5$17,545 AUD

43 data points across 10 retailers

18 retailers$9,667 AUD to $20,945 AUD

B+
Cheapest Retailer
-
$9,667 AUD
$6,775 USD
B+
Retailer 2
-
$9,806 AUD
$6,872 USD
View
B+
Retailer 3
-
$10,459 AUD
$7,330 USD
View
B+
Retailer 4
-
$10,472 AUD
$7,339 USD
View
B+
Retailer 5
-
$11,345 AUD
$7,951 USD
View
B+
Retailer 6
-
$11,519 AUD
$8,073 USD
View
B+
Retailer 7
-
$11,592 AUD
£6,397 GBP
View
Retailer 8
-
$11,860 AUD
View
Price last confirmed 11 days ago
B
Retailer 9
-
$12,485 AUD
$8,750 USD
View
B
Retailer 10
-
$12,485 AUD
$8,750 USD
View
B
Retailer 11
-
$12,899 AUD
$9,040 USD
View
B
Retailer 12
-
$12,927 AUD
€8,628 EUR
View
B
Retailer 13
-
$13,090 AUD
$9,174 USD
View
Retailer 14
-
$13,792 AUD
$9,666 USD
View
Price last confirmed 10 days ago
B
Retailer 15
-
$15,385 AUD
ZAR 174,184 ZAR
View
B
Retailer 16
-
$17,545 AUD
£9,682 GBP
View
B
Retailer 17
-
$19,790 AUD
£10,921 GBP
View
Most Expensive
B
NZ Jewellers
9149c5bf-0b50-4c78-bce4-33fd8893ebd1 · Nov 2
$20,945 AUD
$14,679 USD
View
17 more retailers have this diamond
Prices start from $9,667 AUDSave up to $11,278 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
$9,667 AUD