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Marquise|Natural|GIA

1.51ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 7568187004

Certificate GIA 7568187004

Diamond specifications and retailer prices

From $12,655 AUD
As of November 1, 2026
Save $2,409 AUD (16%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $15,063 AUD at Brilliance · As of November 4, 2026
View at Brilliance

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7568187004. Listed at 4 retailers as of November 1, 2026, with prices from $12,655 to $15,063, a $2,409 spread on the same certified stone. Brilliance lists it at $15,063. 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

1.51
Carat
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 7568187004
Dimensions11.55 × 6.02 × 3.82 mm
L/W Ratio1.92
Culet sizeNone
Key to symbols
Crystal, Feather, Needle, Natural
Top View
11.55 mm6.02 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7568187004
Side View
Table 57.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 63.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $15,063 AUD|Low: $12,538 AUD|High: $15,094 AUD|Avg: $13,752 AUD|+11.1%
Brilliance
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 3$12,655 AUD
Retailer 4$14,005 AUD
Retailer 2$14,947 AUD
Brilliance$15,063 AUD

21 data points across 4 retailers

4 retailers$12,655 AUD to $15,063 AUD

A
Cheapest Retailer
-
$12,655 AUD
B+
Retailer 2
-
$14,005 AUD
View
B
Retailer 3
-
$14,947 AUD
View
Most Expensive
B
Brilliance
D45831041 · Nov 4
$15,063 AUD
$10,350 USD
View
3 more retailers have this diamond
Prices start from $12,655 AUDSave up to $2,409 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.

A
1.51ct Marquise
$12,655 AUD