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I just read a thread about amethyst being encased in glass. I read that it can be done. Is there other gems or stones that can be encased? My grandpa has a bunch of different gem stones that he offered to let me use if I ever want to. I think it would be cool.
What stones have you used in glass, or have you heard being used in glass?
There are a LOT of threads about it already, I highly recommend that you use the search engine. search for encasing stuff, or something....Quote:
Originally Posted by vargdogg
my short list from memory:
all quartzite, gilson opal, corundum, beryl, tourmaline, kyanite... work find
garnet, turquoise, magnets, real opals, magnetite, teeth, bones, starfish, shells, seedpods, and cell phones don't encase well (ok, the cellphone I only saw someone do on a video, don't try it)....
random pebbles from thr ground are hit-or-miss.
There were more... I spent a week or so randomly encasing everything I could find... I bought one of those posters with little mineral/crystal samples glued to it and did all of them.... about 30% survived.
-Doug
I've previously put 4mm a/f zircon in a tube, melted that in placed it on a pendant with success.
re: the original post - amethyst is a type of quartz. typically, quartz can be encased with various outcomes. usually amethyst, citrine and other types of colored quartz lose their color and become cloudy when being encased. some don't like how it looks, others do, just preference. i second GreyMatter mostly except I do encase garnet, magnetite and real opals. the trick with magnetite (and most other iron bearing minerals) is that you need a really low temp so as to not boil out the iron. the trick to real opals are....welll...i can't give that one away...but it can be done.
about the other post, there are hundreds of minerals that can be encased despite what many say. I devote my glassblowing career to encasement of gems, minerals and extraterrestrial rocks. PM if you want more of an idea of what works (or doesn't).
and one last note, sometimes a certain mineral from one location in the world won't work, whereas the same mineral from a different location will. try multiple samples from various locations before you declare a certain mineral won't work. you would probably be surprised how different different samples can act.
wow trippy, i want the real opal secret!
Preheat it in the kiln to drive the water out??
My bench mate is all about encasing different minerals. Her quartz encasements look great. She's also tried obsidian, mica flake, pyrite(sp?/stinky stuff), petrafied wood (didnt work too well) and many others. there are some great threads on this if you do a search
Sorry, I know you're new here and so I don't know your experience with glass and who you are in real life - perhaps we've met... so don't take it as too personal or harsh when I say this but....Quote:
Originally Posted by SeñorPyro
I call bullshit. I will put $100 on it, and I suspect a few people I know would put more on it, to be proven wrong... but I have tried, and many people who make opal encasement a large part of their work have tried it....
If you've got a process that encases natural (mined) opal in hot glass show me some. Send me some for (possibly destructive) tests, if it's true I'll pay for it.
With opal you end up with a hazy chunk of what looks like quartz, no fire, and usually it breaks up... try it. good opal isn't cheap.Quote:
Originally Posted by Boiseno Glassworks
ask maestro...he knows about stones.....
the "rocks" maestro knows about aren't the same thing...
greymatter sorry to hear you're such a debbie downer. i didn't say it was easy or that they even look as good as gilsons but it is very possible but it can be done with 2 different, certain chemical compositions of opal that i am aware of. all opal are not the same.
i sell my opal pieces pretty quick so there's none sitting around. all i have in my studio right now are some leftover opal experiments so i included a picture of them with the corresponding opals. notice they come out clear like crystal opal but were originally precious milk opal. the pendant contains potch opal and was not sold because of the gas ejection, another common problem. sorry this is all i have on hand but i think you get the point.
oh and fyi, i am a professional chemical engineer and self-taught lampworker with more than 9 years experience. My glass career is based on glass and mineral encasements, no pipes or anything else, just mineral encasements. you can keep that $100, i don't accept charity. Sorry to hear you're not more of a gentlemen greymatter.
re: gypsea, calcination and sintering can help with some opals but often hurts many. often the opal loses fire if it is precious, crazes or develops a dark haze. i hope this saves you some money.
Quote:
Originally Posted by SeñorPyro
Quote:
Originally Posted by Greymatter Glass
So I'm pretty sure I know exactly what results you're getting, as I've tried it a few times with results that weren't worth the effort.
I'm glad that you've made a market for yourself selling stuff encased in glass... I'm not going to say it's impossible to encase a natural opal in boro. I will reiterate that the result isn't very attractive, is problematic, it's hit or miss generally, and for the cost of natural opals vs. the result of gilson, there's no question which is a more viable option for encased opals...
If the end result is an "opal" with no fire, bubbles, crazing/splinters/fracturing and you're ok with that, and your customers understand what they're getting then more power to you, and don't let me stop you.
Cool, I am a professional lampworker (11 years) and a self taught mechanical/chemical/nuclear/electrical/computer/physics evil scientist (20+ years). I actually have the TEOS and ammonia to make some gilson opals, just haven't found a still quiet space to leave it to settle for 12-18 months... and then I'd still need that arc furnace for proper sintering....Quote:
Originally Posted by SeñorPyro
As for me being a gentleman...who said I was? I'm usually a nice guy, and I work to get along with people - but hey, sometimes I can be a total dick.
I'm still waiting for any proof that you've successfully encased a natural opal... but I also notice I didn't really state my qualifications for "successful" so here:
Encased stone with little to no trapped air.
No off-gassing from the stone itself.
No cracks or checks either in the stone or in the surrounding glass
No significant loss of color, fire, brilliance, or polish.
As an engineer you should understand that if you add enough heat to drive off water or change the molecular structure of a mineral you've produced a new material...which in the case of Opal you get silica.
...that said, yes, it IS possible to encase a natural opal in glass in a very litteral sense.....but all I see in your pictures is typical results - cracked hazy stones that aren't easily identifiable as opal unless it's marked as such... a curiosity and certainly of interest to other rock hounds and glass junkies... but not many people are going to be shelling out what that same opal would be worth mounted on a ring or as a loose polished stone... *shrug*
By the same definition of "encased" it's possible to encase virtually anything, even things generally not accepted as encasable ... it's important to qualify it with "cleanly encased" I guess...
-Doug
I can piss halfway into the street from the curb.
Am I in?
J/K.
you are so in brotha man.
greymatter, gilsons are def the way to go. much easier and a better value.
but wheres the challenge?
Talking Ross down by $5/gm, selling the end result, and finding good ones...Quote:
Originally Posted by SeñorPyro
but really.. why's it got to be a challenge?
if you want a challenge find a way to encase a diamond in boro.... every time I've done THAT I just end up with a big bubble and some graphite.
well, you could seal it in a tube and call it encased too ...........
so wheres my 100 bucks?
i got fire opal encasement right here.
Haha tru dat Kevin
Kevin that tech is properly referred to as "encapsulation"
i just encapsulated some keystones. almost got a sixer of tall boys encased in my stomache