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Stasa Banjanin 7/1
 My name is Stasa Banjanin. I am a
student of 7th grade of elementary
school ,, Branko Radievi  in
Smederevo, in Serbia. Many liked
this project about crystals and I am
glad to participate. For this project
I chose the Rock Crystal.
 I like the rock crystal becouse I'm very
positive, sincere and sociable person
 Rock crystal is the most powerful
healing stone for all purposes.
 Title: Rock crystal, Quartz (Eng: Quartz)
 Category: semiprecious stone, quartz
 Formula: SiO2 (silicon dioxide)
 Mohs scale of mineral hardness: 7
 Specific gravity: 2.53 - 2.69 g / cm続
 Melting temperature: 1670 属 C
 Refractive index: 1552-1554
 Rock crystal is transparent, glassy
shine. The color is from colorless to
milky white. His sites around the world,
Madagascar, Brazil, USA, Mexico, are
the Alps, India, Australia, Russia,
Czech Republic and Hungary. Rock
crystal is one of the most common
minerals on our planet. Is known as
quartz, rocky quartz, quartz crystal,
colorless quartz.

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  • 1. Stasa Banjanin 7/1 My name is Stasa Banjanin. I am a student of 7th grade of elementary school ,, Branko Radievi in Smederevo, in Serbia. Many liked this project about crystals and I am glad to participate. For this project I chose the Rock Crystal. I like the rock crystal becouse I'm very positive, sincere and sociable person Rock crystal is the most powerful healing stone for all purposes.
  • 2. Title: Rock crystal, Quartz (Eng: Quartz) Category: semiprecious stone, quartz Formula: SiO2 (silicon dioxide) Mohs scale of mineral hardness: 7 Specific gravity: 2.53 - 2.69 g / cm続 Melting temperature: 1670 属 C Refractive index: 1552-1554 Rock crystal is transparent, glassy shine. The color is from colorless to milky white. His sites around the world, Madagascar, Brazil, USA, Mexico, are the Alps, India, Australia, Russia, Czech Republic and Hungary. Rock crystal is one of the most common minerals on our planet. Is known as quartz, rocky quartz, quartz crystal, colorless quartz.