Cast iron cauldrons are perfect to burn your granular incense, use with sand and a tablet of Charcoal then sprinkle the resin when the charcoal is incandescent. The pentacle is a symbol of protection. Most religions on Earth attributes special powers to number 5, which represents the human body, 5 senses, 5 elements, 5 pillars etc. There are also 5 virtues, Love, Wisdom, Truth, Kindness, Justice. It is in the efforts that we make to manifest these 5 virtues that the Divine protection usually attributed to the pentacle becomes effective. Long ago, it was considered by Pythagoreans as a symbol of beauty and harmony.