Yes that's it Ray diatomite! As I recall the outfit in San Diego Cnty,
didn't have a website but I would have driven down to pick it up.
Thanks Rob for the info too & Francis thanks for straightening out the
geographics of this.
I am using pumice with my bark & it works well for me.

--
Cheers Wendy

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Ray wrote:
It's diatomite, not dolomite


Ray Barkalow - First Rays Orchids - www.firstrays.com
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"francis marion" wrote in message
news:IGOmd.350042$wV.310727@attbi_s54...
Wendy:

The rock is Dolomite and it is not only found in Australia. It is
common throughout the world.

It can, if it is deposited in the right conditions, be very
absorbent and retains water in microscopic pores for
quite a long time.

I believe this characteristic is part of what they are pushing in
their presentation. Does it work well enough
to make a difference? That's what I'm trying to find out.

Good day,

Francis M.