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Marquise|Natural|GIA

1.80ct M SI2 Marquise Natural Diamond

M/SI2 • GIA 1545868712

Certificate GIA 1545868712

Diamond specifications and retailer prices

From $7,498 AUD
As of November 6, 2026
Save $555 AUD (7%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $8,053 AUD at The Diamond Guys · As of November 6, 2026
View at The Diamond Guys

About this 1.8ct natural marquise diamond

This 1.8ct natural marquise sits in the one-and-a-half to two carat band, graded M colour (faint-tinted) and SI2 clarity (slightly-included) and certified by GIA 1545868712. Listed at 2 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. 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
M
Colour
SI2
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1545868712
Dimensions12.26 × 6.22 × 3.84 mm
L/W Ratio1.97
Culet sizeNone
Key to symbols
Crystal, Feather
Top View
12.26 mm6.22 mm1.80 ctM / SI2
OriginNatural
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1545868712
Side View
Table 56.0%CrownGirdle: MED-XTKPavilionCulet: NoneDepth 61.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: $7,498 AUD|Low: $4,577 AUD|High: $8,894 AUD|Avg: $7,211 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
The Diamond Guys
October 15, 2026
Retailer 2$4,577 AUD
Retailer 3$6,082 AUD
Retailer 1$7,498 AUD
The Diamond Guys$8,053 AUD
Retailer 4$8,502 AUD
Retailer 5$8,673 AUD

78 data points across 6 retailers

2 retailers$7,498 AUD to $8,053 AUD

B
Cheapest Retailer
-
$7,498 AUD
Most Expensive
C
The Diamond Guys
1992900036 · Nov 6
$8,053 AUD
$5,533 USD
View
1 more retailer has this diamond
Prices start from $7,498 AUDSave up to $555 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
$7,498 AUD