Comets were formed over 4.6 billion years ago. Meteors from comet debris is the destruction of the oldest stuff in the solar system. Asteroids colliding in their orbits eject dust and debris into independent orbits, some of which may cross the earth's orbit. This is believed to be the major source of meteorites. The Geminids originates from asteroid debris.
Particles are more dense.
Perseids Peseids are visible from July 23 to August 22 and peak about August 12-13. The combination of relatively high rates, consistency from year to year and its appearance in the northern hemisphere's summer when weather is warm, have made the Perseids the most widely famous of all the meteor showers. Earliest record of the Perseids comes from Chinese records of AD 36. The first recorded count of Perseid rates was 160 in 1839. There have been exceptions to the normal average maximum rates.