Round|Natural|GIA

3.18ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 6425577637

Certificate GIA 6425577637

Diamond specifications and retailer prices

From $50,230 USD
As of November 1, 2026
Save $41,012 USD (45%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $91,242 USD at Diamond Quarter · As of November 5, 2026
View at Diamond Quarter

About this 3.18ct natural round diamond

This 3.18ct natural round sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6425577637. Listed at 15 retailers as of November 1, 2026, with prices from $50,230 to $91,242, a $41,012 spread on the same certified stone. Diamond Quarter lists it at $91,242. 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

3.18
Carat
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle33°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6425577637
Dimensions9.68 × 9.62 × 5.63 mm
L/W Ratio1.01
Top View
9.68 mm9.62 mm3.18 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6425577637
Side View
Table 62.0%Crown 33°Girdle: THN-MEDPavilion 41°Culet: NoneDepth 58.5%

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: Nov 1
Current: $52,830 USD|Low: $50,230 USD|High: $69,032 USD|Avg: $58,492 USD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 4$50,230 USD
Retailer 1$52,830 USD
Retailer 2$57,032 USD
Retailer 3$66,835 USD
Retailer 5$69,032 USD

46 data points across 5 retailers

15 retailers$50,230 USD to $91,242 USD

B+
Cheapest Retailer
-
$50,230 USD
B+
Retailer 2
-
$52,830 USD
View
B+
Retailer 3
-
$53,342 USD
View
B+
Retailer 4
-
$54,746 USD
View
B+
Retailer 5
-
$55,441 USD
View
B+
Retailer 6
-
$56,267 USD
View
B+
Retailer 7
-
$57,032 USD
View
B+
Retailer 8
-
$59,676 USD
View
B+
Retailer 9
-
$61,280 USD
View
B+
Retailer 10
-
$61,280 USD
View
B+
Retailer 11
-
$62,846 USD
View
B+
Retailer 12
-
$63,320 USD
View
B
Retailer 13
-
$66,835 USD
View
B
Retailer 14
-
$69,349 USD
View
Most Expensive
B
Diamond Quarter
3.18SI1D64377A02N · Nov 5
$91,242 USD
£71,844 GBP
View
14 more retailers have this diamond
Prices start from $50,230 USDSave up to $41,012 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+
3.18ct Round
$50,230 USD