Lisa asks…
What are the scientific name of GREY AGATE stone and LIGHT SALMON stone?
This are kinds of stones/rocks. Used also in making tiles.
admin answers:
Agates are semi-precious gemstones that are a variegated form of chalcedony (pronounced kal-sed’-nee), which is silicon dioxide in the form of microscopic fibrous quartz crystals.
LIGHT SALMON stone will be a Marble. Mineralogy: 95% calcite (CaCO3) or dolomite Ca,Mg(CO3)2. Impurities may give rise to new minerals such as olivine.
Betty asks…
Is my 7c Australian Agate stamp worth anything?
Saw one going for about $200. Is mine worth that much? It says one the top: 7c Australian and on the bottom it says agate. What do I have?
admin answers:
Supposing you stamp looks like the middle one of these:
http://stamps.org/ShowStamp.aspx?Image=Stamp_Images//202/311291202H.jpg&time=2859
American collectors would identify the 7c stamp as Australia Scott catalog number 559, with a catalog value of 30 cents mint, 25 cents used, but no one is likely to offer you as much as catalog value for yours. (If anyone was offering $200 for such a stamp it must have been a rare printing error or the like. Ordinary stamps like this are quite common.)
Ken asks…
any good recommendations for growing blue agate?
I just got one (off of e-bay) and was told to put it in soil & water only when dry. Any other suggestions or tips? (It will be an indoor potted plant, as I live in Philly)
yes - I mean agave!!!!
what is agate - a rock?
admin answers:
The agave is almost as easy to grow as the agate (a rock) would be. It will need alot of light, so put it in the brightest window of the house in winter. In summer put it out in the full sun. Bring it back in before your first frost. When it creates a little pup to the side, just tear it off and plant it in another pot of soil. The pup will form roots and become a new plant.
Donald asks…
A white stone that is like an agate. Fairly massive and possibly volcanic?
I am wondering about the ID.
You can't see into it and it does not seem to transmit any light through it.
It is hard and has vitreous luster.
I see no signs of cleavage planes and it seems to be noncrystalline.
So white opaque glassy hard and tough.
Far too hard to scratch with steel.
Makes me think of white agate.
It is not like milky quartz or quarzite
No reaction to acids.
admin answers:
Most likely flint or chert
Flint and chert, like agate, are both noncrystalline varieties of quartz.
Flint and chert both come in plain white and often has a dull to glassy luster
It is not volcanic, but is sometimes found in volcanic deposits (it is usually found in sedimentary rocks)
images
http://www.beg.utexas.edu/mainweb/publications/graphics/chert400.jpg
http://www.mii.org/Minerals/Minpics1/Chert.jpg
http://itc.gsw.edu/faculty/tweiland/chert.jpg
http://www.ukfossils.co.uk/images/guides/Typical%20flint%20meal%20bearing%20flint%20-%20straight%20out%20of%20the%20chalk.JPG
http://www.wessexarch.co.uk/files/images/flint_scrapers_0.jpg
Maria asks…
does anyone know where to go agate hunting in So Cal?
I like to search for agates on the beach, does anyone know where to go in Southern California? I know where to go in Oregon.
Thanks
admin answers:
I am not sure, but I think you need to go through a gate.
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