Marquise|Natural|GIA

1.00ct E SI1 Marquise Natural Diamond

EX • E/SI1 • GIA 6552654453

Certificate GIA 6552654453

Diamond specifications and retailer prices

From $3,157 USD
As of November 4, 2026
Save $2,847 USD (47%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $6,004 USD at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-carat band, graded E 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 6552654453. Listed at 15 retailers as of November 4, 2026, with prices from $3,157 to $6,004, a $2,847 spread on the same certified stone. Helzberg Diamonds lists it at $6,004. 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

1.00
Carat
E
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.79°
Pavilion angle41.05°
OriginNatural
Grading LabGIA
CertificateGIA 6552654453
Dimensions10.44 × 5.06 × 3.18 mm
L/W Ratio2.06
Culet sizeNone
Top View
10.44 mm5.06 mm1.00 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6552654453
Side View
Table 58.0%Crown 35.79°Girdle: MED-VTKPavilion 41.05°Culet: NoneDepth 62.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $6,004 USD|Low: $3,157 USD|High: $6,004 USD|Avg: $4,130 USD|+4.0%
Helzberg Diamonds
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 6, 2026
Retailer 11$3,157 USD
Retailer 9$3,234 USD
Retailer 6$3,243 USD
Retailer 12$3,404 USD
Retailer 13$3,410 USD
Retailer 7$3,661 USD
Retailer 5$3,802 USD
Retailer 3$4,031 USD
Retailer 4$4,093 USD
Retailer 2$4,197 USD
Retailer 8$4,381 USD
Retailer 14$5,325 USD
Retailer 10$5,665 USD
Helzberg Diamonds$6,004 USD

35 data points across 14 retailers

15 retailers$3,157 USD to $6,004 USD

A
Cheapest Retailer
-
$3,157 USD
A
Retailer 2
-
$3,234 USD
View
A
Retailer 3
-
$3,243 USD
View
A
Retailer 4
-
$3,404 USD
View
B+
Retailer 5
-
$3,410 USD
View
B+
Retailer 6
-
$3,661 USD
View
B+
Retailer 7
-
$3,802 USD
View
B+
Retailer 8
-
$4,031 USD
View
B+
Retailer 9
-
$4,093 USD
View
B+
Retailer 10
-
$4,197 USD
View
B
Retailer 11
-
$4,342 USD
View
B+
Retailer 12
-
$4,381 USD
View
B
Retailer 13
-
$5,325 USD
View
B
Retailer 14
-
$5,665 USD
View
Most Expensive
B
Helzberg Diamonds
XZRMLLIMLKKLJ · Nov 6
$6,004 USD
View
14 more retailers have this diamond
Prices start from $3,157 USDSave up to $2,847 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.

A
1.00ct Marquise
$3,157 USD