Korean cosmetics

What are spicules? Spicules, often called microneedles, are tiny mineral particles that form the skeleton of marine and freshwater molluscs. They are a natural source of calcium and silica. Spicules are often sharply pointed, which is why they are compared to microfossils. Specially purified white spicules with a length of 120-250 μm and a diameter of 7-15 μm are used in cosmetic products. They are incorporated into the textures of gels and creams, where they...