https://www.mindbodygreen.com/0-26933/why-gemstone-massages-are-the-next-big-thing-in-selfcare.html

https://www.energymuse.com/blog

https://www.gemsociety.org/article/obsidian-jewelry-and-gemstone-information/

https://www.geologypage.com/2019/08/obsidian-what-is-obsidian-why-obsidian-is-black.html

https://geology.com/rocks/obsidian.shtml

https://www.thespruce.com/black-obsidian-use-in-healing-and-feng-shui-1274369

https://tinyrituals.co/blogs/tiny-rituals/obsidian-meaning-healing-properties-everyday-uses