CaratHunter
Plans
Marquise|Natural|GIA

1.70ct I SI2 Marquise Natural Diamond

ID • I/SI2 • GIA 5556191720

Certificate GIA 5556191720

Diamond specifications and retailer prices

From $15,419 AUD
$10,806 USD
As of November 2, 2026
Save $8,438 AUD (35%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $23,857 AUD at MOH London · As of October 29, 2026
View at MOH London

About this 1.7ct natural marquise diamond

This 1.7ct natural marquise sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5556191720. Listed at 5 retailers as of October 29, 2026, with prices from $15,419 to $23,857, a $8,438 spread on the same certified stone. MOH London lists it at $23,857. 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

1.70
Carat
I
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5556191720
Dimensions11.92 × 6.36 × 3.65 mm
L/W Ratio1.87
Girdle conditionFaceted
Culet sizeNone
Top View
11.92 mm6.36 mm1.70 ctI / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5556191720
Side View
Table 57.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 57.4%

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 2
Current: $23,857 AUD|Low: $15,419 AUD|High: $24,017 AUD|Avg: $18,881 AUD|-0.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 6$15,419 AUD
Retailer 4$16,285 AUD
Retailer 2$17,723 AUD
Retailer 3$18,109 AUD
Retailer 5$21,660 AUD
MOH London$23,857 AUD

24 data points across 6 retailers

5 retailers$15,419 AUD to $23,857 AUD

B+
Cheapest Retailer
-
$15,419 AUD
$10,806 USD
B+
Retailer 2
-
$16,285 AUD
£8,987 GBP
View
B
Retailer 3
-
$17,723 AUD
£9,780 GBP
View
B
Retailer 4
-
$18,109 AUD
€12,087 EUR
View
Most Expensive
B
MOH London
0CEAF8FE2 · Oct 29
$23,857 AUD
£13,165 GBP
View
4 more retailers have this diamond
Prices start from $15,419 AUDSave up to $8,438 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+
1.70ct Marquise
$15,419 AUD