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Round|Natural|GIA

3.50ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 1555525059

Certificate GIA 1555525059

Diamond specifications and retailer prices

From $36,147 USD
HK$282,400 HKD
As of October 28, 2026
Save $36,731 USD (50%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $72,878 USD at With Clarity · As of October 26, 2026
View at With Clarity

About this 3.5ct natural round diamond

This 3.5ct natural round sits in the three to five carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1555525059. Listed at 4 retailers as of October 26, 2026, with prices from $36,147 to $72,878, a $36,731 spread on the same certified stone. With Clarity lists it at $72,878. 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

3.50
Carat
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1555525059
Dimensions9.59 × 9.66 × 6.05 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Cloud, Needle
Top View
9.59 mm9.66 mm3.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1555525059
Side View
Table 57.0%Crown 35.5°GirdlePavilion 41°Culet: NoneDepth 62.9%

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 28
Current: $36,147 USD|Low: $36,147 USD|High: $72,962 USD|Avg: $47,381 USD|-2.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
With Clarity
October 26, 2026
Retailer 1$36,147 USD
Retailer 5$40,713 USD
Retailer 4$43,596 USD
Retailer 3$44,659 USD
Retailer 2$45,285 USD
With Clarity$72,878 USD

13 data points across 6 retailers

4 retailers$36,147 USD to $72,878 USD

B+
Cheapest Retailer
-
$36,147 USD
HK$282,400 HKD
B
Retailer 2
-
$44,659 USD
View
B+
Retailer 3
-
$45,285 USD
SGD 61,196 SGD
View
Most Expensive
B
With Clarity
1555525059 · Oct 26
$72,878 USD
View
3 more retailers have this diamond
Prices start from $36,147 USDSave up to $36,731 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+
3.50ct Round
$36,147 USD