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Round|Natural|GIA

1.80ct L SI2 Round Natural Diamond

EX • L/SI2 • GIA 1559075191

Certificate GIA 1559075191

Diamond specifications and retailer prices

From $5,785 AUD
As of November 6, 2026
Save $427 AUD (7%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $11,065 AUD at NZ Jewellers · As of October 17, 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 L colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1559075191. Listed at 10 retailers as of November 6, 2026, with a relatively tight 7% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
L
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1559075191
Dimensions7.72 × 7.76 × 4.84 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Cavity, Knot, Needle
Top View
7.72 mm7.76 mm1.80 ctL / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559075191
Side View
Table 58.0%Crown 36.5°Girdle: MED-STKPavilion 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 6
Current: $6,213 AUD|Low: $4,717 AUD|High: $7,160 AUD|Avg: $5,911 AUD|-1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 5$4,717 AUD
Retailer 2$5,055 AUD
Retailer 6$5,785 AUD
Retailer 1$6,213 AUD
Retailer 4$6,498 AUD
Retailer 3$7,063 AUD

32 data points across 6 retailers

10 retailers$5,785 AUD to $6,213 AUD

Retailer 1
-
$4,717 AUD
Price last confirmed 17 days ago
Retailer 2
-
$5,055 AUD
View
Price last confirmed 17 days ago
B+
Retailer 3
-
$5,785 AUD
View
B+
Retailer 4
-
$6,213 AUD
View
Retailer 5
-
$6,287 AUD
View
Price last confirmed 17 days ago
Retailer 6
-
$6,351 AUD
View
Price last confirmed 21 days ago
Retailer 7
-
$6,351 AUD
View
Price last confirmed 22 days ago
Retailer 8
-
$6,498 AUD
View
Price last confirmed 18 days ago
Retailer 9
-
$7,254 AUD
View
Price last confirmed 19 days ago
Most Expensive
NZ Jewellers
e58cb999-bb5f-4216-be1d-d849f00ae070 · Oct 17
$11,065 AUD
$7,746 USD
View
Price last confirmed 19 days ago
9 more retailers have this diamond
Prices start from $5,785 AUDSave up to $427 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
$5,785 AUD