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Round|Natural|GIA

1.51ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 2235864871

Certificate GIA 2235864871

Diamond specifications and retailer prices

From $8,068 AUD
As of November 4, 2026
Save $9,011 AUD (53%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $17,079 AUD at NZ Jewellers · As of November 5, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2235864871. Listed at 17 retailers as of November 4, 2026, with prices from $8,068 to $17,079, a $9,011 spread on the same certified stone. NZ Jewellers lists it at $17,079. 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
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2235864871
Dimensions7.30 × 7.26 × 4.58 mm
L/W Ratio1.01
Culet sizeNone
Top View
7.30 mm7.26 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2235864871
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.9%

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 4
Current: $17,079 AUD|Low: $7,827 AUD|High: $17,079 AUD|Avg: $11,181 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 9$8,538 AUD
Retailer 3$9,251 AUD
Retailer 10$9,251 AUD
Retailer 11$9,251 AUD
Retailer 5$9,632 AUD
Retailer 2$9,904 AUD
Retailer 6$10,495 AUD
Retailer 12$10,675 AUD
Retailer 4$12,174 AUD
Retailer 7$14,194 AUD
Retailer 8$14,805 AUD
NZ Jewellers$17,079 AUD

40 data points across 12 retailers

17 retailers$8,068 AUD to $17,079 AUD

B+
Cheapest Retailer
-
$8,068 AUD
B+
Retailer 2
-
$8,380 AUD
View
B+
Retailer 3
-
$8,538 AUD
View
Final sale: no returns
B+
Retailer 4
-
$9,251 AUD
View
Retailer 5
-
$9,251 AUD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$9,251 AUD
View
B+
Retailer 7
-
$9,422 AUD
View
B+
Retailer 8
-
$9,632 AUD
View
B+
Retailer 9
-
$9,904 AUD
View
B
Retailer 10
-
$10,285 AUD
View
B
Retailer 11
-
$10,285 AUD
View
B
Retailer 12
-
$10,495 AUD
View
B
Retailer 13
-
$10,628 AUD
View
B
Retailer 14
-
$10,675 AUD
View
B
Retailer 15
-
$14,194 AUD
View
B
Retailer 16
-
$14,805 AUD
View
Most Expensive
B
NZ Jewellers
6cca4859-36cc-4e7e-8995-258bec1d02d7 · Nov 5
$17,079 AUD
$11,956 USD
View
16 more retailers have this diamond
Prices start from $8,068 AUDSave up to $9,011 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
$8,068 AUD