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Marquise|Natural|GIA

1.51ct I SI1 Marquise Natural Diamond

GD • I/SI1 • GIA 2554673570

Certificate GIA 2554673570

Diamond specifications and retailer prices

From $8,928 AUD
$6,257 USD
As of November 1, 2026
Save $8,677 AUD (49%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $17,605 AUD at NZ Jewellers · As of October 30, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2554673570. Listed at 15 retailers as of October 30, 2026, with prices from $8,928 to $17,605, a $8,677 spread on the same certified stone. NZ Jewellers lists it at $17,605. 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
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2554673570
Dimensions6.02 × 11.23 × 3.76 mm
L/W Ratio1.87
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Cloud, Feather, Needle
Top View
6.02 mm11.23 mm1.51 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2554673570
Side View
Table 54.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 62.5%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: $17,605 AUD|Low: $8,928 AUD|High: $18,062 AUD|Avg: $10,898 AUD|-2.5%
NZ Jewellers
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
November 2, 2026
Retailer 14$8,928 AUD
Retailer 15$9,246 AUD
Retailer 6$9,259 AUD
Retailer 7$9,460 AUD
Retailer 10$9,632 AUD
Retailer 4$9,716 AUD
Retailer 3$9,731 AUD
Retailer 11$9,758 AUD
Retailer 9$9,901 AUD
Retailer 5$10,305 AUD
Retailer 13$10,435 AUD
Retailer 2$10,595 AUD
Retailer 8$12,040 AUD
Retailer 12$14,543 AUD
NZ Jewellers$17,605 AUD

31 data points across 15 retailers

15 retailers$8,928 AUD to $17,605 AUD

A
Cheapest Retailer
-
$8,928 AUD
$6,257 USD
B+
Retailer 2
-
$9,246 AUD
$6,480 USD
View
B+
Retailer 3
-
$9,259 AUD
$6,489 USD
View
Retailer 4
-
$9,460 AUD
SGD 8,959 SGD
View
Price last confirmed 21 days ago
B+
Retailer 5
-
$9,632 AUD
$6,750 USD
View
Final sale: no returns
B+
Retailer 6
-
$9,716 AUD
$6,809 USD
View
B+
Retailer 7
-
$9,731 AUD
$6,820 USD
View
B+
Retailer 8
-
$9,758 AUD
£5,385 GBP
View
B+
Retailer 9
-
$9,901 AUD
£5,464 GBP
View
Retailer 10
-
$10,305 AUD
View
Price last confirmed 11 days ago
B+
Retailer 11
-
$10,435 AUD
$7,313 USD
View
B+
Retailer 12
-
$10,595 AUD
$7,425 USD
View
B
Retailer 13
-
$12,040 AUD
$8,438 USD
View
B
Retailer 14
-
$14,543 AUD
£8,025 GBP
View
Most Expensive
B
NZ Jewellers
c49883fe-d6f6-4c4c-9c3e-40419c4a033f · Oct 30
$17,605 AUD
$12,338 USD
View
14 more retailers have this diamond
Prices start from $8,928 AUDSave up to $8,677 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
$8,928 AUD