Chattygirl-
The reason why your stone is/was having those problems is because you have dolomitic marble, not quartzite. Quartzite will not etch, will not chip and will not scratch. I think you have a right to all of your money back if they told you it was quartzite. The truth is always there when they go to fabricate because it takes much much longer than marble so if they thought it was quartzite, they would've known that it wasn't when they started your fabrication. As in, on the first cut.
If you're in love with that look instead of Quartz, just get real Quartzite. It's really simple to find out what's what. Read this link--this woman is fantastic and there's a thread a mile long where you can learn a lot but it's all summarized here: http://www.visionlearning.com/blog/2013/12/12/geology-kitchen-mystery-super-white/
Q
desk
Q