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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 $8,155 USD
As of October 28, 2026
Save $6,260 USD (43%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $14,415 USD 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 October 28, 2026, with prices from $8,155 to $14,415, a $6,260 spread on the same certified stone. MOH London lists it at $14,415. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $14,415 USD|Low: $8,155 USD|High: $14,588 USD|Avg: $10,470 USD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 4$8,155 USD
Retailer 6$8,530 USD
Retailer 7$8,641 USD
Retailer 5$9,307 USD
Retailer 3$10,099 USD
Retailer 2$10,766 USD
Retailer 8$12,146 USD
MOH London$14,415 USD

31 data points across 8 retailers

8 retailers$8,155 USD to $14,415 USD

B+
Cheapest Retailer
-
$8,155 USD
B+
Retailer 2
-
$8,530 USD
View
B+
Retailer 3
-
$8,641 USD
View
B+
Retailer 4
-
$9,307 USD
View
B
Retailer 5
-
$10,099 USD
£7,952 GBP
View
B+
Retailer 6
-
$10,766 USD
£8,477 GBP
View
Retailer 7
-
$12,146 USD
View
Price last confirmed 10 days ago
Most Expensive
B
MOH London
9BBBF6E11 · Nov 1
$14,415 USD
£11,350 GBP
View
7 more retailers have this diamond
Prices start from $8,155 USDSave up to $6,260 USD

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
$8,155 USD