John Jason “Jace” Leffler, 69, passed away peacefully surrounded by family on March 24, 2026, in Phoenix, AZ. Born on March 8, 1957, Jace lived a life filled with love, laughter, and dedication to those around him.
Jace’s educational journey took him through James B Rolle in Yuma and Coronado High School in Scottsdale before he pursued his profession at the Gemological Institute of America. His career spanned an impressive 46 years with Gemmark Corporation, where his expertise left an indelible mark.
He is lovingly remembered by his wife and partner of 17 years, Anna; his children, Auston and Ashley; his stepdaughter, Ella; and his two grandchildren. Jace also leaves behind his siblings Rick (Karen), Cherie, Mary (Tony), and Brady (Mary), as well as many nieces and nephews who will deeply miss him. He was preceded in death by his parents, Richard and Marilyn Leffler.
Jace was a man of many talents—a true renaissance man—who brought sunshine into the lives of those who knew him. Known for his humor, open-mindedness, loyalty, and nonjudgmental nature, he was cherished as a husband, idolized as a father, beloved as a brother, and revered as a friend. A lover of music and a beacon of positivity to many, Jace’s legacy is one of warmth and kindness.
A private Celebration of Life will be held in his honor. In lieu of flowers, the family kindly requests donations be made to the Lewy Body Dementia Association in memory of Jace.
May the memory of Jace bring comfort to all who were fortunate enough to know him.
Celebrating 75 years of serving our community