Lucrite is a crop added by Thaumic Bases. It is used as a renewable source of Gold Nuggets. It can only be grown on Farmland that is placed directly above a Salis Mundus Block. When fully grown it will drop its seeds and Gold Nuggets.
You have researched the Metalleat further and discovered,[sic] that you can create a similar crop by infusing a carrot with Lucrum. The result is a very strange crop. It functions just like the Metalleat, but takes twice as much time to grow. It is also very magic dependant - without strong[sic] enough source of magic beneath the soil it grows in it refuses to grow. Those Salis Mundus blocks seem to be just as perfect as possible. It will also accept bonemeal with much slower rate, taking 7 bonemeal to grow. However, should you let it grow and it will grow some Golden Nuggets on it's[sic] branches. Since it is a carrot it is also possible to obtain one from the crop.