If you take a look at Michael Adamowicz's homepage photos and then subsection localities, you can find lots of great examples of roadcuts in Ontario from known collecting spots. This should help a bit with the 80km/hour rockhounding! ;)

If you're lucky enough to see mica or light white/pink calcite, it's likely a good time to stop from my experience so far.]]>

The micro crystal idea is pretty cool. I do have a jewelers loupe and have recently found lots of interesting crystals that I can see with it, but don't look like much to the naked eye. I never really considered them to be much of a collectable, but now see that there are many people that do only that.

I will try to join a rockhounding club or find a mentor. I took a mineral course, but that was for discovering economic mining, rather than occurrences for collecting.

I know how to find gold and silver and that has been my only focus for many years. At the same time, I have completely ignored other minerals and crystals. Heck, I never even kept the interesting stones from my sluice/highbanker, when working placer gold on my claims in northern BC. You will probably yell at me, but until now, if it wasn't visible gold, it was "leverite".

I have access to some mineralized spots on private property or crown land that are difficult to access. For example, where I deer hunt in northern Ont., there are 4 old mines (really, more like cuts/pits) where they harvested mica, copper, feldspar and "unknown" in the late 1800's from different outcrops along one particular lake. When I am back there in Nov., I will give these spots a good look over. I also spend quite a bit of time traveling back trails on ATV or walking the forest. Of course, there is also lots of time spent driving back roads and 4x4 trails in some pretty remote areas in Ont and BC.

I have watched (thoroughly enjoy) all of Rockhound (AKA Caver) videos and bought his recent book. He highly influenced me this year to think I should also pursue crystals. There is a mineral jamboree in Bancroft this weekend and I think he is one of the speakers, so I might get lucky and talk to him.

What I need to learn is how to recognize potential spots to stop (80 KM prospecting) and within these spots where to focus. If I am there for another reason, due to time, it is probably hit and run with a few samples to check later. Probably, not a great approach and certainly not Zen-like (focus on one thing and do it well).

Of interest, I have also taught my Labrador Retriever to bark at sulfides. As a lark, I started her as a pup to find rocks that contain gold and two years ago posted a short video on Youtube of her early training. She can and will still do it, but these need to be isolated rocks. I guess in mine tailings with sliver/cobalt/nickel or gold, the whole area smells the same. She gets excited, but fails to find the individual rocks that I can find with the metal detector. More importantly, she is more interested in birds and bunnies. A great companion, but so far, a lousy rockhound. LOL Next time I am out (for silver), I will mount a GoPro camera on her and try to get some footage from the dog's perspective for a YouTube video.]]>

Good luck.

John]]>

I was asking the same type of questions not that long ago, and found a few things.

I started by doing a review of a few geological conditions(types of rock, scarn, pegmatites, etc.) in my area and compared them to photos off of the net to get a feel for what I am looking at in my region. Then I found some home-grown style youtube videos which put things more into perspective for me. I'll put-up a link for one from a guy I like who makes it quite easy and fun to watch his videos from near Bancroft Ontario.

https://www.youtube.com/watch?v=Ysrvoap3ly8

Knowing what minerals are found in what type of rock will help a lot. Following cracks where two types of rock meet is a good starting point. Following the cracks/veins up to the top of the roadcuts where they exit, will yield results as well. On the other hand, some of the nicest mineral crystals are found actually within the light colored calcite rock, and you have to chip at the rock to reveal them. I hope this helps a bit.

Matt]]>

i'm wondering if there is any 'Mindater' who's going to the ICAM( International Congress for Applied Mineralogy) this year?

The congress will take place in Istanbul/Turkey, on 10 August – 12 August 2015.

Cheers,

Pedro Alves]]>

Perhaps a blue lace agate carved into a cameo of Nemesis: small enough that it wouldn't be obvious and ladies with dresses all look the same???

I am thinking that stones have other associations and those associations have a chain of associations.

Durga is associated with conch shells and possibly rubies???

(or atleast one of the forms of Durga is associated with rubies according to this website, which doesn't look like mainstream Hinduism)

http://www.gemstoneuniverse.com/blog/nine-forms-of-goddess-durga/

and Hessonite is associated with Rahu (or atleast it supposedly pacifies Rahu....)

http://www.gemstoneuniverse.com/hessonite-gemstone-astrology.php

Also a huge thank you to Olav Revheim for the Kunz book, I am downloading it and I am sure it will be useful. I am looking for the religious/cultural associations that gemstones have, this looks to be the closest one so far, rather than the saccharine needs that hippies project into gemstones on the basis of how they feel about them...]]>

If there were such a stone, any person wearing it would not make the next chapter if the ruler cared about staying around (Sort of like being named William when the opponent says "fire at will".). The most evil piece of jewelry in literary history was a plain gold ring (Tolkien was able to get a trilogy out of it). You are probably going to have to get something engraved.

http://www.dailymail.co.uk/sciencetech/article-2669296/May-thief-mad-blind-Roman-curse-tablets-etched-messages-revenge-added-heritage-register.html]]>

> > What kind of gem stone looks or is symbolic of

> poison/murder/revenge?

> Googling "gem stone symbolism" yields a lot of new

> age nonsense.

Your question is th same....]]>

https://archive.org/details/curiousloreofpre028009mbp for download as pdf.

or

Georgius Agricola (1576): De Natura Fossilium (Textbook of Mineralogy), English translation Courier Dover Publications, 2013. 256 pp.

Anselmus de Boodt, Joannes de Laet, Theophrastus (1647): Gemmarum et lapidum historia: quam olim edidit Anselmus Boetius de Boot, ex officina Ioannis Maire, 576 pp.

Madame de Barrera (1860): Gems and Jewels, their History, Geography, Chemistry, and Ana. from the earliest ages down to the present time. Richard Bentley, London, 382 pp.

all of them available for download or online reading.

Olav]]>

you could keep it a ring (poison rings were quite popular in the Renaissance) and with a slight of hand, drop it into the wine.

What kind of gem stone looks or is symbolic of poison/murder/revenge?

Googling "gem stone symbolism" yields a lot of new age nonsense.]]>

For a crime story, better stick with poisonous rare plants.]]>

Are there any other gems that would've been available in the Renaissance that would kill someone quickly if dissolved in wine?]]>

I have no education in geology, and all I know about sciences is from primary and secondary school, my college degree is in arts...

So the question is: we all know that what is on the surface of the Earth is crust (sorry if I have spelled incorrectly), this is rocks and soil... And can you explain to me what was there before crust had "created"? Was it only hot magma, the whole globe covered with magma, and then it cooled down and created the crust? Or am I imagining this wrong?

Monika]]>

I get the same numerator, (u12.a2 + v12.b2 + w12.c2 +2u1w1cos)1/2 is the length of a vector converted from the monoclinic to a cartesian coordinate system.

My denominator has a goniometric part, this must be the case. For example if you take the zone axes [100] and [001] and a=b=c=1, the numerator equals 1 and the cosine of the angle equals the numerator (and the cosine of the monoclinic angle β).

Mark]]>

Numerator: u₁.u₂.a² + v₁.v₂.b² + w₁.w₂.c² + ac(u₂.w₁ + u₁.w₂)

Denominator: (u

Using [001]: u2 = 0; v2 = 0; w2 = 1

Numerator: 0 + 0 + w₁.w₂.c² + ac(0 + u₁.w₂)

Denominator: (u12.a2 + v12.b2 + w12.c2 +2u1w1cos)1/2 . (0 + 0 + w22.c2 +0)1/2

So:

Numerator: w₁.w₂.c² + ac. u₁.w₂

Denominator: (u12.a2 + v12.b2 + w12.c2 +2u1w1cos)1/2 . (w22.c2)1/2

Frank]]>

What was the complete equation? When I work out the dot product for two 'monoclinic' directions I get:

u₁.u₂.a² + v₁.v₂.b² + w₁.w₂.c² + (u₂.w₁ + u₁.w₂).a.c.cosβ]]>

The original equation was for the angle between two directions - the numerator was the dot product between the two directions. There wasn't a cosine function in the numerator of the equation (I have no idea if there should have been one). I will have to try it with the cos(beta). Of course, with the [100] zone, the 1st term drops out leaving: a c cos(beta)

Definitely changes things - I will let you know how it turns out.

Thanks

Frank

(tu)]]>

This looks like an equation to calculate the angle between a crystallographic direction and the c-axis in a monoclinic system. I think the numerator should be w.c2 + u.a.c.cos(beta).

cheers, Mark.]]>

https://answers.yahoo.com/question/index;_ylt=A0LEVyHwlKpVgiUAR.hXNyoA;_ylu=X3oDMTEyZzBycDRvBGNvbG8DYmYxBHBvcwMzBHZ0aWQDQjAzNDFfMQRzZWMDc3I-?qid=20060913073843AASnDvw&p=angle%20between%20zone%20axes

and

http://mathworld.wolfram.com/DotProduct.html]]>

I am trying to calculate the angle between 2 zone axes within a monoclinic crystal - or specifically, the angle between the c-axis ([001]) and a zone axis. I've found this nice equation (below) that really does not work (either in an excel spreadsheet or by hand) - it's the only equation I have found (4 books and several internet sites).

[attachment 59311 Angle.jpg]

modified for [001] as the second zone.

I am working with the amphiboles: the angle between the a- and c-axis ([100] and [001]) should be around 104.9 for tremolite. this is not what I get when I plug the two zones into the eqn (result is 1). I have tables of zone axes for a number of the amphiboles and there aren't many angles that this equation calculates. The angle between [010] and [001] calculates to 90, so I know the eqn works on some level... I am not a crystallographer - not really a mathematician either, but understand it better than crystallography. Obviously, this is a correct equation (or miss-printed numerous times), so I must be missing something.:-S

Can anyone help?

Thanks

Frank]]>