Silver Gemstone

 is an accessory in. Enabling the use of the Spin Strike Triple Tech only once Ayla, Frog, and Robo learn Tail Spin, Aerial Strike, and Laser Spin respectively, it must be equipped by at least one of those three teams mates. To obtain the Silver Gemstone, speak with the Nu in Laruba Ruins after defeating Azala in Tyranno Lair.