Calcium ion — Free Biology Illustration

Biology

Calcium ion

A simple scientific icon of a calcium ion shown as a small to medium-sized smooth or slightly glossy spherical particle or circular symbol. The ion is typically colored pale green, light green, teal, cyan, light blue, bright blue, blue-green, or light gray. It is clearly labeled Ca2+ or marked with a distinct double-positive charge indicator such as 2+ or ++, either centered inside the sphere or placed adjacent in superscript style. The surface is clean and smooth, sometimes with a subtle highlight to suggest its charged state, suitable for chemistry, ion channel, cell signaling, or molecular pathway diagrams, and it may be depicted slightly larger than a sodium ion in comparative icon style.

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