Silk Oil of Morocco serum

Just wondering if anyone knows what "sand-derived" silicones are? I'd heard a few good things about the Silk Oil of Morocco serum so I emailed them for the ingredients. The first three are silicones but it states they are "sand-derived". Does this mean they're okay? Probably a dumb question but I'll ask it anyway LOL!
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The most common constituent of sand is silica, but it sounds more natural (and less artificial, chemical, industrial) to say "sand-derived."
On another note, I had Moroccan Oil put in my hair a few weeks ago by the hairdresser, after a cut, and I was left a total frizzy mess lol
3a/3b strawberry blonde
New to the CG revelation!