429 Too Many Requests Mona is a mass manufacturer of silver jewelry goods since 1989. With 24 years of experience, we are able to create, design and produce high volume of silvery good at 100,000 per week. Mona is a mass manufacturer of silver jewelry goods since 1989. With 24 years of experience, we are able to create, design and produce high volume of silvery good at 100,000 per week.