法苑珠林 32.50

32.50

博物志曰。松脂淪入地千年化為伏苓。伏苓千年化為虎魄。虎魄一名江珠。今太山有伏苓而無虎魄。益州永昌出虎魄而無伏苓。或復云。燒蜂巢所作。未詳此二說孰是。神農本草經云。取雞卵㲉黃白渾雜者熟煮。及尚軟隨意刻作物。以苦酒漬。數宿既堅。內著粉中假者亂真（此世所常用無作不成）。

The Bowu zhi states: "Pine resin sinking into the earth for a thousand years transforms into tuckahoe (fuling). Tuckahoe for a thousand years transforms into amber. Amber is also called 'river pearl' (jiangzhu). Nowadays, Mount Tai has tuckahoe but no amber; Yongchang in Yizhou produces amber but no tuckahoe. Some also say that it is made by burning bee nests. It is not clear which of these two explanations is correct." The Shennong bencao jing states: "Take an eggshell whose yolk and white are scrambled together, and boil it thoroughly. While it is still soft, carve it at will into various objects, and soak it in bitter vinegar. After several nights it becomes hard. Coat it with powder inside, and the counterfeit will be confused with the genuine." (This is commonly used in the world, and nothing made from it fails.)