Vintage, red white and blue enamel and 18k gold ring with the phrase “Memor et Fidelis 89” (Mindful and Faithful).
Based on the motto and the colors, it is likely this is associated with the historic, Roman Catholic “Saint Louis School” in Honolulu, Hawaii. Represented as vintage due to the lack of hallmarks but could be much older. Approximately a size 4.75 and can not be sized. 4mm wide and 1.4mm thick. Weight is 3.71 grams.