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Prospecting Australia

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    please help to ID this rock I found near Beechworth

    Being an agate, it will polish beautifully to a nice super glassy shine. It's a small piece, but the colour is very nice. In my opinion it's worth polishing, but don't expect to get any money for it. Carnelian is a fairly common stone and isn't a precious gem. You can buy it in bulk, fully...
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    Smokey amethyst

    That is a stunning specimen, fossickeract! Though I generally favor cut stones over 'natural' ones, I would think that this particular one is worth more in its natural state, as a specimen. Because of the phantom and its gorgeous termination and its size. Cut citrine (natural or treated) can be...
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    Star sapphire advice needed

    Should you ever be near Redcliffe, bring this stone and drop into the lapidary club there. They have 3 flat laps that get charged with diamond powder (come on a tuesday, when they get freshly charged) 400, 600 and 1200 grit on a hard calico back. Worth a try I'd say.
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    Help with identification please

    Emerald is in the Beryl family, with aquamarine and heliodor etc. Its crystals are hexagonal, where the crystals in yours are trygonal. Yours are dioptase. http://www.mindat.org/min-1295.html The big specimen in your first pic is boulder opal; the one in the background is dioptase. The 3rd...
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    Help with identification

    Do you have facebook? If so, I suggest joining the Australian Crystals and Minerals group and post these pics there as well. There are quite a few very knowledgeable people in that group: https://www.facebook.com/groups/australiancrystals/
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    New cabbing wheel scratches

    Yeah, I've seen this and not just on the resin bonded wheels. We have new sintered wheels at the club to replace the old 80/100 grit wheels. The 180/220 were not replaced and are (very very) well worn in so they weren't up to the task of getting the deep scratches of the new wheels out. It took...
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    alexandrite

    Mindat.org is your friend: http://www.mindat.org/min-109.html
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    Another experimental cab - black spinel

    Those are great stones Lefty! I can imagine what the amethyst looks like, having seen something like it before, but can't do the same for the star spinel. A trick is to take more than one pic: one in indoor lighting, one in overcast or shade outside daylight and one in full sun (at an angle...
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    Quartz with rutile inclusion and lodolita

    That is one stunning crystal! It's good to see you are learning some Australian too :) ! Take care and keep digging, mate!
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    Some boulder opal in progress

    Here's my post in the group https://www.facebook.com/groups/539242229527605/660396497412177/?notif_t=like I think I broke all the records with yhe number of likes and comments on that post.
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    Some boulder opal in progress

    If you are serious about selling some material and showing of your work in general for the whole world to see (and critique! remember that, because you will get some!) it is always a good idea to make a dedicated facebook page, instead of just putting it on your personal page for your friends...
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    Some boulder opal in progress

    There are several interest groups on facebook and there's nothing secret about them. I'll list a few here and you will be able to find more going from the suggestions that come up when you join these: First CABS AND SLABS, https://www.facebook.com/groups/539242229527605/ A big group with...
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    Some boulder opal in progress

    Thanks Bigjilm, I'm quite happy with the results myself. The effort has certainly been worth it as it sold the moment I posted it in a facebook group.
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    Some boulder opal in progress

    I believe they are Koroit boobook. The patterning is apparently quite characteristic for Koroit boulder.
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    Some boulder opal in progress

    Thanks all! I had to hand finish them, as the wheels kept pulling deep gouges in the top. SO handfinished up to 3000grit sandpaper and then onto tin oxide on leather: The crease in the top has been finished on 7000grit sandpaper and is as shiny and lustrous as the rest.
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