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Marquise|Natural|GIA

1.70ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 5566123386

Certificate GIA 5566123386

Diamond specifications and retailer prices

From $11,636 AUD
$8,155 USD
As of November 1, 2026
Save $8,932 AUD (43%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $20,568 AUD at MOH London · As of November 1, 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 5566123386. Listed at 8 retailers as of November 1, 2026, with prices from $11,636 to $20,568, a $8,932 spread on the same certified stone. MOH London lists it at $20,568. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 5566123386
Dimensions11.76 × 6.19 × 3.88 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Top View
11.76 mm6.19 mm1.70 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 5566123386
Side View
Table 58.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 62.6%

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 1
Current: $20,568 AUD|Low: $11,636 AUD|High: $20,816 AUD|Avg: $14,929 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 4$11,636 AUD
Retailer 6$12,171 AUD
Retailer 7$12,330 AUD
Retailer 5$13,280 AUD
Retailer 3$14,291 AUD
Retailer 2$15,361 AUD
Retailer 8$17,331 AUD
MOH London$20,568 AUD

32 data points across 8 retailers

8 retailers$11,636 AUD to $20,568 AUD

B+
Cheapest Retailer
-
$11,636 AUD
$8,155 USD
B+
Retailer 2
-
$12,171 AUD
$8,530 USD
View
B+
Retailer 3
-
$12,330 AUD
$8,641 USD
View
B+
Retailer 4
-
$13,280 AUD
$9,307 USD
View
B+
Retailer 5
-
$14,291 AUD
£7,886 GBP
View
B+
Retailer 6
-
$15,361 AUD
£8,477 GBP
View
Retailer 7
-
$17,331 AUD
$12,146 USD
View
Price last confirmed 10 days ago
Most Expensive
B
MOH London
9BBBF6E11 · Nov 1
$20,568 AUD
£11,350 GBP
View
7 more retailers have this diamond
Prices start from $11,636 AUDSave up to $8,932 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
$11,636 AUD