This property defines the Unicodes which belongs to Shavian block
Characters like 𐑐,𐑑,𐑒, etc. are listed under Shavian Block.
48 Characters are present in Shavian Block starting with the Unicode point U+10450 that represents the character 𐑐.
Currently, as per latest version 15.0.0, Unicode supports 328 number of Block. Here are a few examples - Latin Extended E,Adlam,Aegean Numbers, etc.