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Marquise|Natural|GIA

1.30ct I SI1 Marquise Natural Diamond

VG • I/SI1 • GIA 6551482846

Certificate GIA 6551482846

Diamond specifications and retailer prices

From $6,578 AUD
As of November 5, 2026
Save $345 AUD (5%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $6,924 AUD at 77 Diamonds · As of November 7, 2026
View at 77 Diamonds

About this 1.3ct natural marquise diamond

This 1.3ct natural marquise sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6551482846. Listed at 2 retailers as of November 5, 2026, with a relatively tight 5% 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

1.30
Carat
I
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.9°
Pavilion angle41.7°
OriginNatural
Grading LabGIA
CertificateGIA 6551482846
Dimensions10.63 × 5.70 × 3.66 mm
L/W Ratio1.86
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Cavity, Pinpoint, Natural
Top View
10.63 mm5.70 mm1.30 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551482846
Side View
Table 63.0%Crown 31.9°Girdle: STK-THKPavilion 41.7°Culet: NoneDepth 64.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 5
Current: $6,924 AUD|Low: $6,578 AUD|High: $7,433 AUD|Avg: $7,000 AUD|-5.7%
77 Diamonds
Retailer 2
November 7, 2026
Retailer 2$6,578 AUD
77 Diamonds$6,924 AUD

43 data points across 2 retailers

2 retailers$6,578 AUD to $6,924 AUD

B+
Cheapest Retailer
-
$6,578 AUD
Most Expensive
B+
77 Diamonds
MQCP5RDJRPQT · Nov 7
$6,924 AUD
£3,746 GBP
View
1 more retailer has this diamond
Prices start from $6,578 AUDSave up to $345 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+
1.30ct Marquise
$6,578 AUD