The present invention is to provide irregular shaped particles, the method for producing the same and the use thereof, which have further improved optical characteristics, such as total luminous transmittance and light diffusion, of a resin composition, and have further improved sensation, soft-focus property, shielding property and sustainability, etc. of a cosmetic material, that sufficiently meet the high demand in recent years.The irregular shaped particles of the invention are entirely in the shape of a polyhedron of more than a hexahedron, with each face formed by a concave surface (11), simultaneously satisfying the following conditions: (1) the largest diameter (L1) of the outer shape of each irregular shaped particle is in a range of 0.1~20 μm on average (2) the ratio of the smallest diameter (L2) of the outer shape / the largest diameter (L1) of the outer shape of each irregular shaped particle is in a range of 0.60~0.97 on average and (3) the average number of the concave surface of every irregular shaped particle is in a range of 6~14, of which the ratio of the largest diameter (m1) of each concave surface (11) of the irregular shaped particles / the largest diameter (L1) of the outer shape is in the range of 0.20~0.90.本發明提供可充分因應使樹脂組成物中之總光線穿透率及光擴散性等光學特性更加提高、於化妝料中之使用感、柔焦性、遮蔽性及持續性等更加提高等之近年來要求高度化之異形微粒子、其製造方法及其用途。本發明係使用整體六面體以上之以凹面(11)形成多面體各面之形狀的異形微粒子,其為同時滿足下述(1)~(3)條件的異形微粒子:(1)異形微粒子各個外形之最大徑(L1)的平均值為0.1~20μm之範圍;(2)異形微粒子各個外形之最小徑(L2)外形之最大徑(L1)之比的平均值為0.60~0.97之範圍;(3)異形微粒子各個凹面(11)之最大徑(m1)/外形之最大徑(L1)之比為0.20~0.90之範圍之異形微粒子每1個之凹面(11)數的平均值為6~14個之範圍。11...凹面L1...異形微粒子各個外形的最大徑L2...異形微粒子各個外形的最小徑m1...異形微粒子各個凹面的最大徑
