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Marquise|Natural|GIA

1.80ct K SI2 Marquise Natural Diamond

GD • K/SI2 • GIA 5556300647

Certificate GIA 5556300647

Diamond specifications and retailer prices

From $7,801 AUD
As of November 5, 2026
Save $5,647 AUD (42%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $13,448 AUD at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.8ct natural marquise diamond

This 1.8ct natural marquise sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 5556300647. Listed at 7 retailers as of November 3, 2026, with prices from $7,801 to $13,448, a $5,647 spread on the same certified stone. NZ Jewellers lists it at $13,448. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.80
Carat
K
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.47°
Pavilion angle41.81°
OriginNatural
Grading LabGIA
CertificateGIA 5556300647
Dimensions11.05 × 6.24 × 4.36 mm
L/W Ratio1.77
Girdle conditionVery Thick
Key to symbols
Twinning Wisp, Feather, Indented Natural
Top View
11.05 mm6.24 mm1.80 ctK / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5556300647
Side View
Table 55.0%Crown 41.47°GirdlePavilion 41.81°Culet: NoneDepth 69.8%

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: $13,448 AUD|Low: $7,740 AUD|High: $14,237 AUD|Avg: $9,640 AUD|-5.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 3, 2026
Retailer 8$7,740 AUD
Retailer 7$7,801 AUD
Retailer 4$8,040 AUD
Retailer 5$8,040 AUD
Retailer 3$8,056 AUD
Retailer 2$9,082 AUD
Retailer 6$12,873 AUD
NZ Jewellers$13,448 AUD

35 data points across 8 retailers

7 retailers$7,801 AUD to $13,448 AUD

B+
Cheapest Retailer
-
$7,801 AUD
B+
Retailer 2
-
$8,040 AUD
View
B+
Retailer 3
-
$8,040 AUD
View
B+
Retailer 4
-
$8,056 AUD
View
B+
Retailer 5
-
$9,082 AUD
View
Retailer 6
-
$12,873 AUD
View
Price last confirmed 8 days ago
Most Expensive
B
NZ Jewellers
ecc6f9ee-8fa8-462b-ad36-fb1bdecff873 · Nov 3
$13,448 AUD
$9,240 USD
View
6 more retailers have this diamond
Prices start from $7,801 AUDSave up to $5,647 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 Marquise
$7,801 AUD