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Marquise|Natural|GIA

1.51ct H SI1 Marquise Natural Diamond

VG • H/SI1 • GIA 5556531806

Certificate GIA 5556531806

Diamond specifications and retailer prices

From $15,595 AUD
As of November 6, 2026
Save $10,054 AUD (39%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $25,649 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded H 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 5556531806. Listed at 11 retailers as of November 5, 2026, with prices from $15,595 to $25,649, a $10,054 spread on the same certified stone. NZ Jewellers lists it at $25,649. 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
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5556531806
Dimensions10.98 × 5.75 × 3.67 mm
L/W Ratio1.91
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Indented Natural, Needle, Natural
Top View
10.98 mm5.75 mm1.51 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5556531806
Side View
Table 61.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 63.8%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $15,942 AUD|Low: $15,942 AUD|High: $24,324 AUD|Avg: $19,562 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 1$15,942 AUD
Retailer 3$16,468 AUD
Retailer 7$16,718 AUD
Retailer 2$17,245 AUD
Retailer 6$19,310 AUD
Retailer 4$22,452 AUD
Retailer 5$23,969 AUD

40 data points across 7 retailers

11 retailers$15,595 AUD to $25,649 AUD

B
Cheapest Retailer
-
$15,595 AUD
B
Retailer 2
-
$15,942 AUD
View
B
Retailer 3
-
$16,468 AUD
View
Retailer 4
-
$16,718 AUD
View
Price last confirmed 15 days ago
B
Retailer 5
-
$17,168 AUD
View
B
Retailer 6
-
$17,245 AUD
View
B
Retailer 7
-
$18,332 AUD
View
B
Retailer 8
-
$19,310 AUD
View
B
Retailer 9
-
$22,452 AUD
View
B
Retailer 10
-
$23,969 AUD
View
Most Expensive
C
NZ Jewellers
01211c48-ab80-4a2d-a4fc-f3dd241d3655 · Nov 5
$25,649 AUD
$17,623 USD
View
10 more retailers have this diamond
Prices start from $15,595 AUDSave up to $10,054 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
$15,595 AUD