"to blast with sand" (so as to clean or polish a hard surface), 1878 (implied in sand-blasted), from sand (n.) + blast (v.). Earlier as a noun, "contrivance to drive sand by air or steam." Related: Sand-blasting.
"water-worn detritus finer than gravel; fine particles of rocks (largely crystalline rocks, especially quartz); the material of the beach, desert, or sea-bed;" Old English sand, from Proto-Germanic *sandam (source also of Old Norse sandr, Old Frisian sond, Middle Dutch sant, Dutch zand, German Sand), from PIE *bhs-amadho- (source also of Greek psammos "sand;" Latin sabulum "coarse sand," which is the source of Italian sabbia, French sable), suffixed form of root *bhes- "to rub."
Historically, the line between sand and gravel cannot be distinctly drawn. Used figuratively in Old English in reference to innumerability and instability. General Germanic, but not attested in Gothic, which used in this sense malma, related to Old High German melm "dust," the first element of the Swedish city name Malmö (the second element meaning "island"), and to Latin molere "to grind."
Metaphoric for innumerability since Old English. In compounds, often indicating "of the shore, found on sandy beaches." In old U.S. colloquial use, "grit, endurance, pluck" (1867), especially in have sand in (one's) craw. Sands "tract or region composed of sand," is by mid-15c.
Middle English blasten, from Old English blæstan "to blow, belch forth," from Proto-Germanic *bles- (source also of German blasen, Gothic blesan "to blow"), from PIE root *bhle- "to blow." From 16c.-19c., it often meant "to breathe on balefully, cause to wither, blight, prevent from blossoming or maturing." The meaning "to blow up by explosion" is from 1758. Related: Blasted; blasting.
<a href="https://www.etymonline.com/word/sand-blast">Etymology of sand-blast by etymonline</a>
Harper, D. (n.d.). Etymology of sand-blast. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/sand-blast