A typical ka'athyra was made of bahun'ahb, sher skah and li'pon, with pins made of eridanite. (TOS reference: Star Fleet Technical Manual) Spock was an accomplished ka'athyra player. (TOS episode: "Charlie X", et al) He was given his instrument by his father, Sarek, and found transposing music from other worlds to be performed on the ka'athyra to be a compelling logical exercise. (TOS novel: Vulcan's Forge) Vulcan lute was taught at the Tenaran Music Academy, and played by both Joran Dax and Temzia Nirenn. (DS9 - The Lives of Dax short story: "Allegro Ouroboros in D Minor")