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Marquise|Natural|GIA

1.70ct F SI2 Marquise Natural Diamond

EX • F/SI2 • GIA 1555639716

Certificate GIA 1555639716

Diamond specifications and retailer prices

From $19,349 AUD
$13,560 USD
As of October 29, 2026
Save $10,652 AUD (36%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $30,000 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 F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1555639716. Listed at 7 retailers as of October 29, 2026, with prices from $19,349 to $30,000, a $10,652 spread on the same certified stone. MOH London lists it at $30,000. 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
F
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1555639716
Dimensions11.72 × 6.26 × 3.85 mm
L/W Ratio1.87
Girdle conditionFaceted
Culet sizeNone
Top View
11.72 mm6.26 mm1.70 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1555639716
Side View
Table 63.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 61.5%

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: Oct 29
Current: $30,000 AUD|Low: $19,349 AUD|High: $30,202 AUD|Avg: $23,923 AUD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 29, 2026
Retailer 8$19,349 AUD
Retailer 2$20,341 AUD
Retailer 5$20,477 AUD
Retailer 3$21,655 AUD
Retailer 4$24,039 AUD
Retailer 6$27,068 AUD
Retailer 7$27,239 AUD
MOH London$30,000 AUD

38 data points across 8 retailers

7 retailers$19,349 AUD to $30,000 AUD

B+
Cheapest Retailer
-
$19,349 AUD
$13,560 USD
B+
Retailer 2
-
$20,341 AUD
£11,225 GBP
View
B
Retailer 3
-
$20,477 AUD
$14,351 USD
View
B
Retailer 4
-
$21,655 AUD
£11,950 GBP
View
B
Retailer 5
-
$24,039 AUD
€16,045 EUR
View
B
Retailer 6
-
$27,068 AUD
$18,970 USD
View
Most Expensive
B
MOH London
AD75CD469 · Oct 29
$30,000 AUD
£16,555 GBP
View
6 more retailers have this diamond
Prices start from $19,349 AUDSave up to $10,652 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
$19,349 AUD