Strong Bones Spiral black filled icon
Outline bone with a spiral coil wrapped around the middle of its shaft
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About the Strong Bones Spiral black filled icon
One bone, drawn diagonally with rounded double knobs at each end, has a loose spiral wrapped around the middle of its shaft to suggest reinforcement and density. It stands for bone strength, calcium and vitamin D, osteoporosis prevention and skeletal health. Useful on supplement packaging, pharmacy and clinic sites, nutrition apps, orthopedic pages and medical infographics.
The diagonal placement fills the square evenly, and the coil crosses in front of and behind the shaft so the wrap reads as three-dimensional. It pairs with joint, muscle and vitamin icons. Keep it above 32 px so the spiral does not blur into the bone.
This is the solid black filled version of the strong bones spiral icon: a bold silhouette that reads clearly at 16-24 px and on dark or busy backgrounds, and prints well in one colour.
It downloads free as an SVG vector or transparent PNG in seven sizes, and the free online editor lets you recolor it, apply gold, silver, neon and gradient styles, add animation, or convert it to EPS, PDF and DXF.
Free for personal and commercial use with attribution.
