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Marquise|Natural|GIA

1.51ct G SI1 Marquise Natural Diamond

VG • G/SI1 • GIA 1558829621

Certificate GIA 1558829621

Diamond specifications and retailer prices

From $13,216 AUD
As of November 6, 2026
Save $9,601 AUD (42%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $22,818 AUD at MOH London · As of November 4, 2026
View at MOH London

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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 1558829621. Listed at 13 retailers as of November 4, 2026, with prices from $13,216 to $22,818, a $9,601 spread on the same certified stone. MOH London lists it at $22,818. 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

1.51
Carat
G
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1558829621
Dimensions11.17 × 5.88 × 3.79 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Pinpoint
Top View
11.17 mm5.88 mm1.51 ctG / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1558829621
Side View
Table 60.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 64.4%

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: $22,818 AUD|Low: $11,827 AUD|High: $23,123 AUD|Avg: $15,863 AUD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 6, 2026
Retailer 8$11,827 AUD
Retailer 5$13,216 AUD
Retailer 6$13,291 AUD
Retailer 11$14,129 AUD
Retailer 7$14,176 AUD
Retailer 4$14,295 AUD
Retailer 12$15,314 AUD
Retailer 10$15,822 AUD
Retailer 2$16,491 AUD
Retailer 15$17,081 AUD
Retailer 14$17,319 AUD
Retailer 16$17,319 AUD
Retailer 9$17,705 AUD
Retailer 3$17,901 AUD
Retailer 13$18,011 AUD
MOH London$22,818 AUD

9 data points across 16 retailers

13 retailers$13,216 AUD to $22,818 AUD

B+
Cheapest Retailer
-
$13,216 AUD
B+
Retailer 2
-
$14,129 AUD
View
B+
Retailer 3
-
$14,295 AUD
View
B
Retailer 4
-
$15,314 AUD
View
B+
Retailer 5
-
$15,822 AUD
View
B
Retailer 6
-
$16,491 AUD
View
B
Retailer 7
-
$17,081 AUD
View
B
Retailer 8
-
$17,319 AUD
View
B
Retailer 9
-
$17,319 AUD
View
B
Retailer 10
-
$17,705 AUD
View
B
Retailer 11
-
$17,901 AUD
View
B
Retailer 12
-
$18,011 AUD
View
Most Expensive
B
MOH London
941042344 · Nov 4
$22,818 AUD
£12,345 GBP
View
12 more retailers have this diamond
Prices start from $13,216 AUDSave up to $9,601 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+
1.51ct Marquise
$13,216 AUD