These days, however, there is a concerted effort to replenish truffle-bearing trees to increase truffle production. However, you should be wary of the false truffles, which are not edible because of their poison. You can barely tell them apart from genuine or edible truffles, as they strongly resemble each other, not to mention that false truffles outnumber the real ones. French Black Truffles or Perigord Truffles French black truffles are considered the best truffle variety, which is why it can cost as much as $1,000 per pound. When fresh, a Perigord truffle has a bluish black outer cover. And when it ages, its exterior become brownish black and emits a strong earthy aroma. These types include the White Truffles which are the most rare among the types of truffles; the Black Truffles, which is very expensive because it can only be found in an oak tree; the Chinese Truffles which are the most available type because it grows bountifully in China and are often being exported to various parts of the world; and the Summer Truffles, which have milder aroma compared to other winter truffle types. Other varieties and truffle-like species also grow in North Africa. Truffles have risen to popularity because these are used in various gourmet restaurants to come up with dishes that use truffles as main or substitute ingredient. Here are some of the most common types of truffles that are being used in gourmet dishes: - the Oregon white truffle or Tuber oregonense and T. And since they grow underneath the ground, they cannot disperse spores on their own through air. They rather depend on animals that feed on them to spread their spores. What Do They Look Like? A truffle is not your typical mushroom that looks like an open umbrella. Instead, truffle mushrooms look like wrinkled potato or coal. Knowing Truffles Mushrooms are such a sought-after delicacy to people all over the world. In fact, because of its popularity, it has become a staple ingredient to so many dishes. Among the most sought-after types of mushrooms are called truffles mainly because it is rare and is so expensive compared to other types there are.