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Round|Natural|GIA

1.03ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1559549275

Certificate GIA 1559549275

Diamond specifications and retailer prices

From $2,423 AUD
As of November 4, 2026
Save $3,978 AUD (62%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $6,401 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.03ct natural round diamond

This 1.03ct natural round sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1559549275. Listed at 6 retailers as of November 4, 2026, with prices from $2,423 to $6,401, a $3,978 spread on the same certified stone. NZ Jewellers lists it at $6,401. 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

1.03
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1559549275
Dimensions6.43 × 6.46 × 4.01 mm
L/W Ratio1.00
Star length50%
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Cloud, Feather
Top View
6.43 mm6.46 mm1.03 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1559549275
Side View
Table 58.0%Crown 36.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.3%

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 4
Current: $6,401 AUD|Low: $2,017 AUD|High: $6,401 AUD|Avg: $3,726 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 5$2,423 AUD
Retailer 6$2,650 AUD
Retailer 3$3,038 AUD
Retailer 2$3,364 AUD
Retailer 4$4,585 AUD
NZ Jewellers$6,401 AUD

26 data points across 6 retailers

6 retailers$2,423 AUD to $6,401 AUD

A
Cheapest Retailer
-
$2,423 AUD
Final sale: no returns
B+
Retailer 2
-
$2,650 AUD
View
B+
Retailer 3
-
$3,038 AUD
View
B+
Retailer 4
-
$3,364 AUD
View
B
Retailer 5
-
$4,585 AUD
View
Most Expensive
B
NZ Jewellers
4227146a-3a3a-46c1-b34d-3e252ed990b2 · Nov 5
$6,401 AUD
$4,481 USD
View
5 more retailers have this diamond
Prices start from $2,423 AUDSave up to $3,978 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
1.03ct Round
$2,423 AUD