Thanks jentrex, but I wonder if you are seeing what she meant, because I had commented that a greenish tone --gray-green or olive - wouldn't bother me and she said "more like lime jello"!

Glad to hear that after a year & half you've had no problems.

Here's a previous thread on green bloom, described as fluorescent green.

Here is a link that might be useful: green bloom

Thanks, may_flowers! If I decide to use River white (or any of the white granites) I will be sure to ask about preventing this.

I was told this was only an issue with the older accelerants used. The new accelerants don't cause have this issue. Is that correct?

River White and Kasmir White can both darken some with time. The "green bloom is caused when an accelerant is used to quicken the cure time of cyanoacrylic glue/filler. There are some new accelerants that are less likely to cause green blooms but there is still many on the market that still will cause this.

The sales lady is mistaken by stating the stone will do this on it's own.

This post was edited by kevdp4 on Tue, Feb 11, 14 at 20:06

Would it still do it if it was honed?

I'm no expert, but what I've read about green bloom says it happens very shortly after the stone is fabricated. Like within a few days, maybe a few weeks. And it's the result of a chemical used in fabrication, not a flaw in the stone

Thank you, kevdp4! I'm in the process of finding a fabricator now (a surprising difficult task). I've had my mind set on River White but was having second thoughts after seeing discussion of "green bloom."

I'm so sorry to hear about your granite. Now I'm wondering about our choice. Does anyone know if this green bloom affects bianco romano granite, too?

The 'green bloom" does not occur naturally in the stone. It is caused by the accelerator that is sometimes used during the fabrication/install process. If no accelerator is used by the fabricator/installer there should be no "green bloom".