Miseki Jewelry has been in business since 1967, with over 52 years of commitment to quality, value, and integrity.
Colored stones jewelry
watch battery replacement
We also carry.....
(Miseki Jewelry is authorized exclusive dealer for Seiko Watch in Northern California.)
We are graduated from Gemological Institute of America
-applied jewelry professional
Masaharu Mike Nagasuga
owner, gemologist, appraiser
He graduated from Gemological Institute of America (GIA) in 1980. He has the comprehensive knowledge of diamonds and colored stones, technical expertise and practical skills to evaluate gemstones by the 4Cs (color, clarity, cut, and carat weight), the International Diamond Grading System™, and the Colored Stone Grading System.
Develop in-depth, hands-on experience with the GIA International Diamond Grading System™ and the 4Cs (color, clarity, cut and carat weight)
Grade diamonds in the D-to-Z color range
Build a knowledge base about colored stones and the colored stone market
Use gemological equipment effectively to identify gemstones
Use the GIA Colored Stone Grading System to evaluate gemstone quality
Identify gemstone characteristics, simulants and treatments, and recognize when advanced testing is required
Understand how gems are mined, fashioned and brought to the marketplace
Recognize how quality, rarity and color affect value
Determine how market factors affect gem value
He is also honest, and takes pride in selling fine products.
Miseki Jewelry has been a long-time supporter of the Queen Program Committee and always presented the 1st place winner with a prize necklace every year since the program’s beginning. The certificate of appreciation was sent to him by the City and County of San Francisco for his generosity and commitment to the Japanese American community.