About Us
at Great Lakes Boutique


Family-owned and operated, Great Lakes Coin and Jewelry benefits from over 50 years of employee experience in the coin and jewelry buying industry. Our experience and dedication to customer service has made us an area leader in coin and jewelry for cash exchanges in the Greater Cleveland and Northeast Ohio Area.

Company Information:

Opened Willoughby location on October 1, 2008
Opened Mentor location on October 1, 2013
Family owned and operated, Licensed by the State of Ohio. Owner: Mike Ponsart Employees: Harry Yonkura, Tarak Fahmy, Stephanie Frick, Angel Mastandrea.

We are a PCGS Authorized Coin Dealer. PCGS is the #1 Authority on Coin Grading. We are a PCGS Authorized Currency Dealer. Other organizations we belong to are PAN, ANA, and FUN.

Mike Ponsart, Owner
Mike started in the business at the age of 9 attending coin shows with his grandfather Harry. He could barely see over the cases. While growing up, Mike attended as many shows as he could with Harry. He attended Mercyhurst College on a football scholarship and graduated with a Bachelor’s Degree. Before opening the store, Mike had branched out from doing only coins to also learn jewelry and diamonds. He is now known as one of the fairest diamond and gold buyers in Northeastern Ohio.

Angel Mastandrea, Fashion Consultant
Angel has a professional background as a stylist and esthetician prior to joining Great Lakes Boutique in June of 2014. Her bubbly personality and fashion sense are great attributes when it comes to consulting with customers on what should be worn and how with our unique line of products. 

Stephanie Frick, Online/Social Media Customer Service

After graduating with her Bachelor's of Psychology from Notre Dame College in 2015, Stephanie joined our team full time. She has been with the company since August 2014 where she interned for Consumerology. Since then she has become our online customer service representative. She also handles our online marketing and social media platforms.


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Great Lakes Boutique & Great Lakes Coin and Jewelry LTD.
8920 Mentor Ave. Mentor, OH 44060 | 440-266-8900

All prices and availability are subject to change without notice.
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