Marquise|Natural|GIA

3.51ct D SI1 Marquise Natural Diamond

VG • D/SI1 • GIA 6555906629

Certificate GIA 6555906629

Diamond specifications and retailer prices

From $58,046 USD
SGD 78,441 SGD
As of November 1, 2026
Save $35,495 USD (38%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $93,541 USD at Helzberg Diamonds · As of November 1, 2026
View at Helzberg Diamonds

About this 3.51ct natural marquise diamond

This 3.51ct natural marquise sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6555906629. Listed at 13 retailers as of November 1, 2026, with prices from $58,046 to $93,541, a $35,495 spread on the same certified stone. Helzberg Diamonds lists it at $93,541. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

3.51
Carat
D
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.13°
Pavilion angle40.92°
OriginNatural
Grading LabGIA
CertificateGIA 6555906629
Dimensions14.75 × 7.85 × 5.14 mm
L/W Ratio1.88
Culet sizeNone
Top View
14.75 mm7.85 mm3.51 ctD / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555906629
Side View
Table 61.0%Crown 40.13°Girdle: THK-VTKPavilion 40.92°Culet: NDepth 65.5%

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: Nov 1
Current: $93,541 USD|Low: $58,046 USD|High: $98,392 USD|Avg: $72,061 USD|-4.9%
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
November 2, 2026
Retailer 11$58,046 USD
Retailer 7$61,034 USD
Retailer 10$61,530 USD
Retailer 12$61,808 USD
Retailer 8$64,188 USD
Retailer 3$64,836 USD
Retailer 13$65,457 USD
Retailer 4$69,228 USD
Retailer 5$71,864 USD
Retailer 9$74,292 USD
Retailer 2$74,387 USD
Retailer 6$89,132 USD
Helzberg Diamonds$93,541 USD

33 data points across 13 retailers

13 retailers$58,046 USD to $93,541 USD

B+
Cheapest Retailer
-
$58,046 USD
SGD 78,441 SGD
B+
Retailer 2
-
$61,034 USD
£48,058 GBP
View
B+
Retailer 3
-
$61,530 USD
View
B+
Retailer 4
-
$61,808 USD
View
B+
Retailer 5
-
$64,188 USD
View
B+
Retailer 6
-
$64,836 USD
View
B+
Retailer 7
-
$65,457 USD
SGD 88,456 SGD
View
B
Retailer 8
-
$69,228 USD
View
B+
Retailer 9
-
$71,864 USD
View
B
Retailer 10
-
$74,292 USD
View
B
Retailer 11
-
$74,387 USD
€70,845 EUR
View
B
Retailer 12
-
$89,132 USD
View
Most Expensive
B
Helzberg Diamonds
XZRMLLLPGMMIP · Nov 1
$93,541 USD
View
12 more retailers have this diamond
Prices start from $58,046 USDSave up to $35,495 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+
3.51ct Marquise
$58,046 USD