Longmeida Stone Group's "Understanding Stone in Seconds": Click on the link directly to enter the video page according to the name of the material variety.
the third group:Fish Maw Gold, Sky Blue, Beige Impression, Ness Wood Grain, Silk Road Impression, Snow Seal, Fashion Grey, Van Gogh Grey.
the fourth group:Ultraman, Black Sea Jade, Lafite Wood Grain, Jin Roman, Moyu White Root, Cosmic Phantom, Kaya Beige Yellow.
Note: The above materials are sorted in no particular order to show the publicity effect.