this post was submitted on 07 Sep 2023
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Right? A dime is a touch over 18mm, and prices I’ve been able to nail down on a couple sites for artificial rubies of that size, while way less than terrestrial rubies, cannot be considered ”cheap” - we’re still talking thousands of dollars.
Maybe they mean ruby infused grinding wheels?
https://www.travers.com/product/radiac-ruby-surface-grinding-wheels-71150
Or maybe they were exaggerating a little bit and thinking about ruby bearings.
https://www.renishaw.com/shop/Product.aspx?Product=A-5000-3611
A million f[beep]ing diamonds!