how to polish petrified wood

{"cid":"91193519","title":"Natural Polished Light Green Onyx Stone Customized Size For Wall Decoration","imgUrl":"https:\/\/img.ismap.com\/nimg\/1a\/a3\/83eb3f42988ca4984b82aea5fa2e-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"Brothers Stone","Model Number":"BS-OM0005","Minimum Order Quantity":"20 Square Meter\/Square","Place of Origin":"China","Supply Ability":"10000 Square Meter\/Square Meters per Month of Sofitel Gold Marble","Packaging Details":"Outer packing:With Seaworthy Standard Packing. Inner packing:Plastic Film and Foam; & Outer:Wooden Crates \/ Pallets.","Color":"Green","Surface Finishing":"Polished, Polished,honed,natural aplit,saw-cut,bushhammered,chiseled,etc.","Marble Type":"Onyx","Stone Form":"Big Slab","Stone Name":"green onyx","Product name":"Natural Polished Petrified Wood Light Green Onyx Stone","Trade":"FOB,CNF","material":"natural transparent jade\/onxy","thickness":"15-18mm","thickness tolerance":"+\/- 1mm","Usage":"Indoor high-grade adornment. Component. Lavabo,etc.","Quality controlled":"All products checked by experienced QC pieces by pieces and then pack","Size":"Can be customized","Application":"Wall, floor, countertop, Crafts","Type":"Marble","Port":"Yunfu or Guangzhou"}}