Luck, luck, luck, luck, luck, and luck. Example= i have 500+ hours on MHF2. MY friend has 100 hours flat. We did Azure lao shan lung, he got a ruby and a heavy armor sphere. the worst part was I DID THE MOST DAMAGE. Another stupid happening, we did G grn plessy, and my friend got a wyvern stone. So back on topic, it could take more than 10 lao, los, ian, and any other G class quest runs to get it. if you have friends do it with them im 90% sure you have to kill it.