The Tampanensis Truffle was the first to be discovered and cultivated. It is also called the Philosophers Stone, due to its rather insightful and reflective effects.
For most people, 5 to 9 grams have a medium effect, while 15 grams can lead to a strong high.
First effects are likely to be felt after around 15 to 45 minutes and can last somewhere between 4 to 6 hours.
You can eat Truffles or use them as tea (let it simmer for 20 minutes, don't let the water boil).
BE AWARE that these amounts are averages and can vary from person to person. Always start with a low dose.