Cathay Pacific
Cathay status (the former Marco Polo Club) is earned on Status Points from Cathay Pacific and oneworld flights over a 12-month membership year. Cathay Pacific is a oneworld founder, so Gold is Sapphire and Diamond is Emerald. Confirm current Status Point thresholds on cathaypacific.com.
4 rungs, from the bottom up.
Qualification thresholds are the published ones as last checked and change most years; confirm the current numbers with Cathay Pacific. Alliance equivalences and the lounge rules that follow from them move far more slowly.