×
carat vs. color  length*  width*
  ×

(or examine a single gem)
* size in mm (optional)

0.4 Carat Diamond Round (4.79×4.79 mm)

white
actual size
0.4ct Diamond image - Round, White
Actual size is set for screen Change
Settings »
Ring:
Skin tone:
Ring width: 3.0 mm
Saved...
Finger image
Ring on finger
White 0.4ct Diamond on a ring
64 mm
Your settings
Ring
Gold
Skin tone
Light
Ring diameter
16.9 mm
Ring width
3.0 mm
Finger length
64 mm
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2

Additional Info

Diamond is the hardest natural material (nothing can scratch it, but another diamond) and a very attractive and expensive gem. Diamonds can occur in a whole spectrum of colors, although white or colorless are the most popular.

Where to buy?
JamesAllen → high-quality Diamonds, high-end jewelry and competitive prices. Highly recommended.
Amazon → usually offers a good selection from many different vendors. Worth a check.

Gem Details

Name:
Diamond
Mineral Class:
Diamond
Shape:
Round
Chemical Formula:
C
Crystal Structure:
Isometric
Hardness:
10
Specific Gravity
3.52
Carat weight:
0.4 ct
Gram weight:
0.08 g (0.0028 ounces)
Points:
40 pts
Length:
4.79 mm
Width:
4.79 mm
Average diameter:
4.79 mm
Est. face-up size:
18.02 mm²
Volume:
22.73 mm³
Length-to-width ratio:
1
Refractive Index:
2.417 - 2.419
Cleavage:
1
Luster:
Adamantine
Birefringence:
None
Wearability:
Excellent
Care Instructions:
No special or unusual care
Color:
White Light Red Red Dark Red Orangey Red Light Orange Orange Light Brown Brown Dark Brown Light Yellow Yellow Light Yellowish Green Yellowish Green Dark Yellowish Green Light Green Green Dark Green Light Bluish Green Bluish Green Dark Bluish Green Light Blue Blue Dark Blue Light Violet Violet Dark Violet Light Purple Purple Dark Purple Light Gray Gray Black
Birthstone:
Diamond is a birthstone for the month of April

Popular comparisons:

Enter your screen size (diagonal)

My screen size is  inches



Actual size is currently adjusted to screen.

If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a gem, ring and finger will not be shown correctly.