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Round|Natural|GIA

1.80ct N SI1 Round Natural Diamond

EX • N/SI1 • GIA 1523798790

Certificate GIA 1523798790

Diamond specifications and retailer prices

From $5,378 AUD
As of November 5, 2026
Save $4,443 AUD (45%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $9,821 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.8ct natural round diamond

This 1.8ct natural round sits in the one-and-a-half to two carat band, graded N colour (tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1523798790. Listed at 8 retailers as of November 5, 2026, with prices from $5,378 to $9,821, a $4,443 spread on the same certified stone. NZ Jewellers lists it at $9,821. 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

1.80
Carat
N
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1523798790
Dimensions7.74 × 7.71 × 4.83 mm
L/W Ratio1.00
Star length50%
Culet sizeNone
Key to symbols
Feather, Cloud, Crystal, Cavity, Needle, Indented Natural
Top View
7.74 mm7.71 mm1.80 ctN / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1523798790
Side View
Table 59.0%Crown 36°GirdlePavilion 41°Culet: NoneDepth 62.6%

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 5
Current: $9,821 AUD|Low: $5,378 AUD|High: $9,821 AUD|Avg: $6,482 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 8$5,378 AUD
Retailer 4$5,637 AUD
Retailer 6$5,637 AUD
Retailer 7$5,637 AUD
Retailer 2$6,331 AUD
Retailer 5$6,504 AUD
Retailer 3$6,880 AUD
NZ Jewellers$9,821 AUD

29 data points across 8 retailers

8 retailers$5,378 AUD to $9,821 AUD

B+
Cheapest Retailer
-
$5,378 AUD
Retailer 2
-
$5,637 AUD
View
Price last confirmed 8 days ago
B
Retailer 3
-
$5,637 AUD
View
B
Retailer 4
-
$5,637 AUD
View
B
Retailer 5
-
$6,331 AUD
View
B
Retailer 6
-
$6,504 AUD
View
B
Retailer 7
-
$6,880 AUD
View
Most Expensive
C
NZ Jewellers
043cb40f-40d3-4e6e-9e29-4f47bfdc8aa9 · Nov 5
$9,821 AUD
$6,875 USD
View
7 more retailers have this diamond
Prices start from $5,378 AUDSave up to $4,443 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+
1.80ct Round
$5,378 AUD