What Is Holy Basil? Holy basil, sometimes called Thai basil tulsi, is an herb from the same family as the basil often used in cooking. Although it's used in Ayurvedic medicine, clinical studies backing up any of the traditional uses for this herb are limited.
Diamond is an allotrope of carbon. It is the hardest known natural material and the third-hardest known material after aggregated diamond nanorods and ultrahard fullerite. Its hardness and high dispersion of light make it useful for industrial applications and jewelry.
The hardest commercially available hardwood is hickory, and it is five times harder than aspen, one of the âsoftâ hardwoods. And while this example lists just some of the most popular hardwood species, there are hundreds of varieties, representing the North American hardwood population. While some tropical hardwoods can be used for interior applications, including flooring, the color, grain pattern, hardness and luster of many imported woods differ from those of American hardwoods. 2  For more information on non-native species, refer to the â Donât be fooled â article.