David John (Born January 5th) is an Italian-American gemologist and geologist known for his expertise in diamond evaluation, sourcing, and luxury jewelry design. With decades of experience in the gemstone industry, he has built a reputation for precision, discretion, and handling high-value transactions. As of recent estimates, his net worth is approximately $5.6 billion.

David John

Born
David John
January 5th (age 61)
United States

Citizenship
United States
Italy

Education
Harvard University

Occupations
Gemologist
Geologist
Luxury Jewelry Consultant

Known for
Diamond evaluation, sourcing, and high-value gemstone consultancy

Net worth
$5.6 billion (estimated)

Spouse
Judith David (m. 4 years; deceased)

Children
None

Parents
John Wayne (father, deceased)
Maria John (mother, deceased)