After three record-breaking hurricanes hammered America last year, the influential spiritual healer Heather Askinosie wrote a blog post for the Earth. “The recent barrage of megastorms we’ve witnessed has inspired some sobering reflections on the effects we are having on our planet,” she wrote on Mindbodygreen.com, a lifestyle site with millions of followers. “So what can we do to show our love and appreciation for the role that Earth plays in our lives?”

The answer, she wrote, can be found in healing crystals.

Askinosie cited three naturally occurring minerals to help readers “connect to the Earth you’re fighting to protect.” Jasper can “help you gain a broader awareness of your personal impact.” Clear quartz is a “perfect crystal for plotting out new beginnings.” And bloodstone—which is a dark green with red splatters—“helps you to see how essential the fate of the earth is, and take your intention seriously.”

All of these crystals for connecting with the Earth are available to buy on Askinosie’s site, Energy Muse Jewelry, but it’s unclear where exactly on Earth they’re from. A bloodstone listed at $6.50 has no source mentioned. Nor does an $84.88 clear quartz “clarity necklace” or a $17.88 clear quartz touchstone. Ocean jasper is one of the few stones on the site with a specific source listed: Madagascar, the only known place where ocean jasper is found; even then, it’s not clear which mine it came from. But that the country is mentioned makes Askinosie’s site a rarity among popular sellers of healing crystals, which consistently lack information about where and how these spiritual stones are mined.

I tried to track down the sources of crystals sold on popular websites. I found that some were mined in countries with notoriously lax labor and environmental regulations, and some came from large-scale U.S. mines that have contaminated ecosystems and drinking water. The impacts of extracting crystals are admittedly low compared to those of industrial gold, copper, granite, or rare earth mining, but crystals have gone from a new-age fad to a multi-billion dollar industry. And given that crystals can be used to “make a promise to mama earth,” it would seem important to know how they were extracted from mama earth.