Perhaps, it s the rarity and the fact that truffles are buried deep within the earth. Truffles are so scarce that they are hard to find. Yes, you can find them in every part of the world, but it takes a great deal of hard work, time, patience, and knowledge about various truffle species to be able to collect these precious finds. There are truffles like the black winter variety that is best bought during its peak season which is from February to March. Truffles have their own characteristics and colors which could change based on their age or maturity. For example, black truffles when still young would have red exterior color with the inside white instead of black. - the Italian white truffle or Tuber magnatum which is commonly found in Piedmont in Italy. Next to the French Black Truffles, this type is preferred by many gourmet chefs because it has a distinctive peppery taste which is very ideal when served raw. - the Burgundy or Summer truffle. Also called the Tuber aestivum or Tuber uncinatum, this type originates in France, Italy, and Spain. If you are planning to cultivate truffles, then there are several things that you would have to consider. Host plants - There are truffle businesses, like the Garland, that do not only buy gourmet mushrooms and truffles, but they also sell inoculated trees to serve as host plants or trees for the mushrooms. The most familiar among these truffle varieties is the black winter truffle, also popularly known as the umbria truffle, the black diamond truffle, the French black truffle, or the Perigord. With a diamond shape and black-grayish color, the black winter truffle gives off a very strong aroma and tastes earthy. An Oregon white truffle has a white exterior, which turns brownish orange as it ages. 7. Oregon Black Truffles Larger and less popular than Oregon white truffles, the Oregon blacks emit a strong earthy smell when they are mature. Their exterior and interior are both dark colored. They appear like rough lumps of coal with a texture of ground almonds and moist Parmesan.