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Marquise|Natural|GIA

0.66ct F SI1 Marquise Natural Diamond

ID • F/SI1 • GIA 2566234983

Certificate GIA 2566234983

Diamond specifications and retailer prices

From $1,503 USD
As of November 2, 2026
Save $805 USD (35%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $2,906 USD at NZ Jewellers · As of September 20, 2026
View at NZ Jewellers

About this 0.66ct natural marquise diamond

This 0.66ct natural marquise sits in the half to three-quarter carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2566234983. Listed at 7 retailers as of November 2, 2026, with a 54% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

0.66
Carat
F
Color
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2566234983
Dimensions8.53 × 4.50 × 2.84 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud
Top View
8.53 mm4.50 mm0.66 ctF / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2566234983
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 63.2%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $2,906 USD|Low: $680 USD|High: $2,906 USD|Avg: $1,301 USD
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
November 2, 2026
Retailer 10$712 USD
Retailer 12$727 USD
Retailer 14$927 USD
Retailer 6$939 USD
Retailer 5$943 USD
Retailer 3$1,060 USD
Retailer 11$1,069 USD
Retailer 4$1,218 USD
Retailer 8$1,503 USD
Retailer 9$1,510 USD
Retailer 7$1,550 USD
Retailer 13$1,697 USD
Retailer 2$2,308 USD
NZ Jewellers$2,906 USD

31 data points across 14 retailers

7 retailers$1,503 USD to $2,308 USD

Retailer 1
-
$927 USD
Price last confirmed 42 days ago
Retailer 2
-
$1,069 USD
View
Price last confirmed 41 days ago
B
Retailer 3
-
$1,503 USD
View
B
Retailer 4
-
$1,510 USD
View
B
Retailer 5
-
$1,550 USD
View
B
Retailer 6
-
$2,308 USD
£1,818 GBP
View
Most Expensive
NZ Jewellers
3aaa573a-0312-41d3-90fb-93e3920f7c82 · Sep 20
$2,906 USD
View
Price under review
6 more retailers have this diamond
Prices start from $1,503 USDSave up to $805 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
0.66ct Marquise
$1,503 USD