jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on May 20, 2017 14:28:43 GMT -5
Lizardite, perfect name for this yellow and greenish stones. Serious ?
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Post by melhill1659 on May 21, 2017 15:01:48 GMT -5
Lizardite, perfect name for this yellow and greenish stones. Serious ? This is a little PDF I found Serpentine mineral serpentine, any of a group of hydrous magnesium-rich silicate minerals. The composition of these common rock-forming minerals approximates Mg3Si2O5(OH)4. Serpentine generally occurs in three polymorphs: chrysotile, a fibrous variety used as asbestos; antigorite, a variety occurring in either corrugated plates or fibres; and lizardite, a very fine-grained, platy variety. Named in allusion to its resemblance to a snake’s skin, serpentine is usually grayish, white, or green but may be yellow (chrysotile) or green-blue (antigorite); the green colour is due to iron replacing magnesium. Serpentine. Serpentine. Encyclopædia Britannica, Inc. Serpentine is formed below 500 °C (930 °F) by the addition of water and sometimes silica to various magnesium silicates—e.g., forsterite or enstatite. It characteristically occurs along the crests and axes of great folds, such as island arcs or Alpine mountain chains. Typical occurrences are in altered peridotites, dunites, or pyroxenites; serpentinite is a rock consisting largely of serpentine. Serpentine takes a high polish and is sometimes used as an ornamental stone.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
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Post by jamesp on May 21, 2017 16:18:35 GMT -5
Lizardite, perfect name for this yellow and greenish stones. Serious ? This is a little PDF I found Serpentine mineral serpentine, any of a group of hydrous magnesium-rich silicate minerals. The composition of these common rock-forming minerals approximates Mg3Si2O5(OH)4. Serpentine generally occurs in three polymorphs: chrysotile, a fibrous variety used as asbestos; antigorite, a variety occurring in either corrugated plates or fibres; and lizardite, a very fine-grained, platy variety. Named in allusion to its resemblance to a snake’s skin, serpentine is usually grayish, white, or green but may be yellow (chrysotile) or green-blue (antigorite); the green colour is due to iron replacing magnesium. Serpentine. Serpentine. Encyclopædia Britannica, Inc. Serpentine is formed below 500 °C (930 °F) by the addition of water and sometimes silica to various magnesium silicates—e.g., forsterite or enstatite. It characteristically occurs along the crests and axes of great folds, such as island arcs or Alpine mountain chains. Typical occurrences are in altered peridotites, dunites, or pyroxenites; serpentinite is a rock consisting largely of serpentine. Serpentine takes a high polish and is sometimes used as an ornamental stone. Well that answers the serpents and the lizards. A resemblance to reptile skin. Steatite/soapstone may be altered serpentine in some way. Georgia mountains-cool soapstone near old ruby/garnet mines. Green/yellow too, semi-clear. You can saw it with a carpenter's saw. Very soft. Put a chunk in the oven and heat it up, it will stay hot for a long time after removed. Soapstone wood stoves. like the lizard colors. cool stuff
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Post by melhill1659 on May 21, 2017 17:42:25 GMT -5
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Post by 1dave on May 21, 2017 17:50:11 GMT -5
Yep, just right!
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Jolene
off to a rocking start
Member since May 2017
Posts: 18
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Post by Jolene on May 21, 2017 23:40:56 GMT -5
Mel, that Lizardite is beautiful. I cannot wait to see what you do with it, super interesting colour.
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on May 23, 2017 4:04:51 GMT -5
Lizardite, perfect name for this yellow and greenish stones. Serious ? This is a little PDF I found Serpentine mineral serpentine, any of a group of hydrous magnesium-rich silicate minerals. The composition of these common rock-forming minerals approximates Mg3Si2O5(OH)4. Serpentine generally occurs in three polymorphs: chrysotile, a fibrous variety used as asbestos; antigorite, a variety occurring in either corrugated plates or fibres; and lizardite, a very fine-grained, platy variety. Named in allusion to its resemblance to a snake’s skin, serpentine is usually grayish, white, or green but may be yellow (chrysotile) or green-blue (antigorite); the green colour is due to iron replacing magnesium. Serpentine. Serpentine. Encyclopædia Britannica, Inc. Serpentine is formed below 500 °C (930 °F) by the addition of water and sometimes silica to various magnesium silicates—e.g., forsterite or enstatite. It characteristically occurs along the crests and axes of great folds, such as island arcs or Alpine mountain chains. Typical occurrences are in altered peridotites, dunites, or pyroxenites; serpentinite is a rock consisting largely of serpentine. Serpentine takes a high polish and is sometimes used as an ornamental stone. I believe lizardite, serpentine, antigorite are all part of a huge and very complex group of stones called amphiboles. The proportions of magnesium/sodium/calcium/iron all vary somewhat. So, because it's a rock and nature ain't perfect it's quite impossible to pin down EXACTLY what it may be. I mean it could very well be any of them or something in between the defined stones. Then what do you call it? What if it is almost perfectly antigorite but has a component of sodium? I'm not saying you shouldn't stick with what you have concluded. You probably can't do any better. I'm just pointing out why it is so hard to even pick a name! Stone identification ain't easy, or perfect. Nice find nonetheless. I'm jealous!
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Post by 1dave on May 23, 2017 9:28:42 GMT -5
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on May 23, 2017 9:45:30 GMT -5
Audacious....
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Post by melhill1659 on May 23, 2017 9:47:55 GMT -5
This is a little PDF I found Serpentine mineral serpentine, any of a group of hydrous magnesium-rich silicate minerals. The composition of these common rock-forming minerals approximates Mg3Si2O5(OH)4. Serpentine generally occurs in three polymorphs: chrysotile, a fibrous variety used as asbestos; antigorite, a variety occurring in either corrugated plates or fibres; and lizardite, a very fine-grained, platy variety. Named in allusion to its resemblance to a snake’s skin, serpentine is usually grayish, white, or green but may be yellow (chrysotile) or green-blue (antigorite); the green colour is due to iron replacing magnesium. Serpentine. Serpentine. Encyclopædia Britannica, Inc. Serpentine is formed below 500 °C (930 °F) by the addition of water and sometimes silica to various magnesium silicates—e.g., forsterite or enstatite. It characteristically occurs along the crests and axes of great folds, such as island arcs or Alpine mountain chains. Typical occurrences are in altered peridotites, dunites, or pyroxenites; serpentinite is a rock consisting largely of serpentine. Serpentine takes a high polish and is sometimes used as an ornamental stone. I believe lizardite, serpentine, antigorite are all part of a huge and very complex group of stones called amphiboles. The proportions of magnesium/sodium/calcium/iron all vary somewhat. So, because it's a rock and nature ain't perfect it's quite impossible to pin down EXACTLY what it may be. I mean it could very well be any of them or something in between the defined stones. Then what do you call it? What if it is almost perfectly antigorite but has a component of sodium? I'm not saying you shouldn't stick with what you have concluded. You probably can't do any better. I'm just pointing out why it is so hard to even pick a name! Stone identification ain't easy, or perfect. Nice find nonetheless. I'm jealous! I TOTALLY AGREE WITH YOU AND DAVE 1dave!!! I've read enough to know IT IS one of, a combination of and possibly metamorphed into... 😂😂😂 gotta love mineralogy! Got everyone reading though 😘
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Post by melhill1659 on May 23, 2017 9:59:01 GMT -5
Look at this little beauty! Reminds me of Biggs/Dechutes Jasper.
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