CaratHunter
Plans
Marquise|Natural|GIA

3.51ct D SI1 Marquise Natural Diamond

ID • D/SI1 • GIA 3555176515

Certificate GIA 3555176515

Diamond specifications and retailer prices

From $80,836 USD
As of October 29, 2026
Save $23,264 USD (22%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $104,100 USD at Diamonds Direct · As of October 30, 2026
View at Diamonds Direct

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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 3555176515. Listed at 3 retailers as of October 29, 2026, with prices from $80,836 to $104,100, a $23,264 spread on the same certified stone. Diamonds Direct lists it at $104,100. 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

3.51
Carat
D
Color
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle33.09°
Pavilion angle39.33°
OriginNatural
Grading LabGIA
CertificateGIA 3555176515
Dimensions17.59 × 7.70 × 4.50 mm
L/W Ratio2.28
Girdle conditionThick
Key to symbols
Crystal, Feather, Needle
Top View
17.59 mm7.70 mm3.51 ctD / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 3555176515
Side View
Table 59.0%Crown 33.09°Girdle: MED-THKPavilion 39.33°Culet: NoneDepth 58.4%

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: Oct 29
Current: $104,100 USD|Low: $71,140 USD|High: $106,522 USD|Avg: $88,930 USD|-2.3%
Diamonds Direct
Retailer 2
Retailer 3
Retailer 4
October 30, 2026
Retailer 3$71,140 USD
Retailer 2$80,836 USD
Retailer 4$98,028 USD
Diamonds Direct$104,100 USD

3 data points across 4 retailers

3 retailers$80,836 USD to $104,100 USD

B+
Cheapest Retailer
-
$80,836 USD
B
Retailer 2
-
$98,028 USD
£77,187 GBP
View
Most Expensive
B
Diamonds Direct
1032952 · Oct 30
$104,100 USD
View
2 more retailers have this diamond
Prices start from $80,836 USDSave up to $23,264 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
$80,836 USD