Is Mexico a Carribean Country?

The Southeast coast of Mexico (Quintana Roo) is a part of the Caribbean. Cozumel, Cancun and Riviera Maya are popular Mexico destinations on the Caribbean coast of Mexico.

I have seen a beautiful beach in Mexico through fb. Maybe you can name one?

Best Beaches in Mexico are:
Isla Holbox.
Zihuatanejo.
Isla Mujeres.
Cozumel.
Cancun.
Playa del Carmen.
Sayulita.
Tulum.

I was looking for white sand shores too. Thank you.