You will need to register your warranty with the company that manufactured your stone, generally within 30 days of installation:
Caesarstone: www.caesarstone.com.au
Quantum Quartz: www.quantumquartz.com.auSmartstonewww.smartstone.com.au
Silestone / DEKTON: www.cosentino.com (Company Name: Multiform, ID: 6000021900)
EssaStone: www.essastone.com