Golf ball

A golf ball comprising a spherical constituent member, wherein

• the spherical constituent member is formed from a rubber composition containing (a) a rubber component containing a natural rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, and (d) an organic sulfur compound,
• a center hardness (Ho) of the spherical constituent member is 65 or more in Shore C hardness,
• a hardness difference (Hs−Ho) between a surface hardness (Hs) and the center hardness (Ho) of the spherical constituent member is 3 or more and less than 16 in Shore C hardness,
• an absolute value of a hardness difference (Hs−H50) between the surface hardness (Hs) of the spherical constituent member and a hardness (H50) at a 50% point of a radius of the spherical constituent member from a center of the spherical constituent member is 10 or less in Shore C hardness,
• a hardness difference (H50−Ho) between the hardness (H50) and the hardness (Ho) ranges from 3 to 10 in Shore C hardness, and
• the hardness (H50) ranges from 76.2 to 85 in Shore C hardness.

A one-piece golf ball formed from a rubber composition,

• wherein the rubber composition contains (a) a rubber component containing a natural rubber and a synthetic rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, (d1) an organic sulfur compound of thiophenols and/or polysulfides and (d2) an organic sulfur compound of thiazoles,
• a center hardness (Ho) of the one-piece golf ball is 65 or more in Shore C hardness,
• a hardness difference (Hs−Ho) between a surface hardness (Hs) and the center hardness (Ho) of the one-piece golf ball is 12 or less in Shore C hardness,
• an absolute value of a hardness difference (Hs−H50) between the surface hardness (Hs) of the one-piece golf ball and a hardness (H50) at a 50% point of a radius of the one-piece golf ball from a center of the one-piece golf ball is 10 or less in Shore C hardness, and
• a hardness difference (H50−Ho) between the hardness (H50) and the hardness (Ho) ranges from 3 to 10 in Shore C hardness.