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Thursday, January 31, 2008
There's Still Time....
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Sunday, January 20, 2008
New Charms!
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![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiMF_kjvpwR3sogvPHGm0wLTfcllvMY9M-IUxaB5nRxU_UdAdog4Ab0JWUEZy3JwJQGzn8bcgEokUWdctV63idEqjNTKz3MoDedNDUmnL0iUdNHL9rhtKBqwO6jdAtnqEA35EOkj4zPmxo/s400/fleafinds2.jpg)
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There's still time to throw your name in the hat for my Valentine's giveaway! Just post a comment on the "giveaway" post below......also, for those of you that mention my upcoming giveaway on your blog, I am holding a separate drawing for a thank you gift. Just drop me a line to let me know that you posted about it and I will throw your name in that hat too. :)
Stay tuned for a sneak peek at the giveaway prize later this week!
Saturday, January 19, 2008
Oh No, I'm Late!
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Thank you for the tremendous response to all that have entered my Valentine's Day giveaway! There's still plenty of time, so please spread the word, and let people know that they can enter by leaving a comment on my previous post, or by signing up to receive my blog updates via email. I will be accepting names for the giveaway up until January 31st at Midnight.
I am also following Lana's lead, and for those of you that post about my giveaway on your blogs, I will hold a separate drawing for a thank you gift! Please let me know that you posted about it on your blog by leaving another comment or by emailing me at Sylvia@SylviaAnderson.com
I hope you all have a wonderful weekend, and stay tuned for a sneak peek in the upcoming week! :)
Wednesday, January 9, 2008
Sneak Peek & Valentine's Givaway!
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Friday, January 4, 2008
Aquamarine - as a mineral
Aquamarine | |
---|---|
Aquamarine | |
General | |
Category | beryl variety |
Chemical formula | Be3Al2Si6O18[1] |
Identification | |
Color | transparent (or can be translucent if included), greenish blue to blue green, typically light in tone[1] |
Crystal system | hexagonal[1] |
Cleavage | very difficult in one direction, almost never seen[1] |
Fracture | conchoidal[1] |
Mohs Scale hardness | 7.5 - 8[1] |
Luster | vitreous to resinous[1] |
Polish luster | vitreous [1] |
Refractive index | 1.577 - 1.583 (+/- .017)[1] |
Optical Properties | Double refractive, uniaxial negative[1] |
Birefringence | .005 - .009[1] |
Dispersion | .014[1] |
Pleochroism | weak to moderate, blue and greenish blue; or different tones of blue with lighter tones associated with the optic axis direction [1] |
Ultraviolet fluorescence | inert[1] |
Absorption spectra | indistinct lines at 537 and 456nm. Depending on the depth of color, there is a strong line at 427nm.[1] |
Specific gravity | 2.72 (+.18, -.05)[1] |
Composition
Aquamarine is a beryl with a hexagonal crystal structure and a chemical formula of Be3Al2Si6O18, a beryllium aluminium silicate mineral. It has a specific gravity of 2.68 to 2.74 and a Mohs hardness of from 7.5 to 8. Aquamarine typically is on the low end of the specific gravity range, normally at less than 2.7. The pink variety exhibits a high specific gravity of around 2.8. Refractive indices range around 1.57 to 1.58.
Locations of deposits
It occurs at most localities which yield ordinary beryl, some of the finest coming from Russia. The gem-gravel placer deposits of Sri Lanka contain aquamarine. Clear yellow beryl, such as occurs in Brazil, is sometimes called aquamarine chrysolite. When corundum presents the bluish tint of typical aquamarine, it is often termed Oriental aquamarine.
In the United States, aquamarines can be found at the summit of Mt. Antero in the Sawatch Range in central Colorado. In Brazil, there are mines in the states of Minas Gerais, Espírito Santo and Bahia. Zambia also produces nice aquamarine as well as Madagascar, Malawi, Tanzania and Kenya. Much of today's aquamarine is heated to give it a better color blue. The deeper the blue color, the more valuable the gem is considered.
The biggest aquamarine ever mined was found at the city of Marambaia, Minas Gerais, Brazil, in 1910. It weighed over 110 kg, and its dimensions were 48.5 cm long and 42 cm in diameter.
Aquamarine is the official state gem of Colorado.
Culture and historical/mythical usage
- Aquamarine (along with Bloodstone) is the birthstone associated with March. It is also the gemstone for the 19th Anniversary.
- People in the Middle Ages thought that aquamarine could magically overcome the effects of poison.
- Ancient sailors traveled with aquamarine crystals, believing that it would ensure a safe passage, and guarantee a safe return; they often slept with the stones under their pillow to ensure sound sleep. They believed the siren’s (mermaid) fish-like lower body was made of aquamarine.
source : http://en.wikipedia.org/wiki/Aquamarine