The author specifies 20 different stones, 34 healing patterns, & 6 metaphysical/magic patterns. The diagrams are line drawings, not photos. The bibliography is extensive (& necessary). Multiples of various stones are used in the patterns. She gives a short sentence on what each stone type in the layout is supposed to do/represent. While you may find yourself wishing for a little more detail, the publisher HAS billed it as a "companion" to her book "Crystal Enchantments" (also with no photos). Note: some systems do not advocate using an abundance of different stones in a layout & the author herself gives a warning not to leave them on for longer than 15 minutes.
Very practical applications. Lack some explanations and how different layouts may work though. One has to try the layout himself/herself in order to find out.