The term 'Prize Marble' refers to a type of marble that is highly sought after due to its rarity and beauty. The three crossword solutions for this term are AGATE (5 letters), TAW (3 letters), and AGGIE (5 letters). AGATE is a type of quartz that is characterized by its banded layers of different colors. TAW is a type of marble that is usually white with a single colored swirl. AGGIE is a type of marble that is made from AGATE and is often used in jewelry.