This is a polished raw Zagi Mountain Quartz purchased at a mineral show about 10 years ago, wrapped with medical-grade stainless steel wire for ease of wear. *Safe for those with metal allergies. At first glance, it appears to be a brown stone, but this is actually quartz densely packed with astrophyllite. When held up to the light (image 4), you can enjoy the shades of the astrophyllite. It is a very powerful stone, and some say it "annihilates all negativity." My impression is that it is a stone that has the power to solve problems that you've been concerned about but putting off. It is tied with waxed cord so that the length can be adjusted, but of course, you can also wear it stylishly with a chain. This item cannot be further discounted. Please take a look at my profile for more information. Thank you for looking m(_ _)m