SOURCES

INFORMATIONS :

cristal taillé par l eau

https://www.google.com/url?sa=i&source=images&cd=&ved=2ahUKEwjerJzv55blAhVJKuwKHSAtBdsQjRx6BAgBEAQ&url=https%3A%2F%2Fau-royaume-des-colibris.fandom.com%2Ffr%2Fwiki%2FLe_Royaume_du_Cristal&psig=AOvVaw1tJYDDBhk8Qjw9CMkgZxWh&ust=1570972606438864

créartion du cristal

https://www.google.com/url?sa=i&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwioraKV6JblAhUDMewKHUjAA7QQjRx6BAgBEAQ&url=%2Furl%3Fsa%3Di%26source%3Dimages%26cd%3D%26ved%3D%26url%3Dhttps%253A%252F%252Fwww.futura-sciences.com%252Fplanete%252Fdossiers%252Fgeologie-croissance-mineraux-650%252Fpage%252F2%252F%26psig%3DAOvVaw1tJYDDBhk8Qjw9CMkgZxWh%26ust%3D1570972606438864&psig=AOvVaw1tJYDDBhk8Qjw9CMkgZxWh&ust=1570972606438864

certaines grotes sont entierements en cristal!

https://www.google.com/url?sa=i&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwjU3rP16ZblAhVCDOwKHSV4BIkQjRx6BAgBEAQ&url=%2Furl%3Fsa%3Di%26source%3Dimages%26cd%3D%26ved%3D%26url%3Dhttps%253A%252F%252Fgenerationvoyage.fr%252F20-plus-belles-grottes-du-monde%252F%26psig%3DAOvVaw1xoeAUbBbepg955I1SedRh%26ust%3D1570973287604624&psig=AOvVaw1xoeAUbBbepg955I1SedRh&ust=1570973287604624

il ne faut pas confondre les pierres préssieuses et les cristaux.

https://www.google.com/url?sa=i&source=images&cd=&ved=2ahUKEwi80-K67pblAhXLjqQKHR3RCl0QjRx6BAgBEAQ&url=https%3A%2F%2Fwww.institutfrancais-madagascar.com%2F%25C3%25A9v%25C3%25A8nement%2Fpierres-precieuses-de-madagascar-et-dailleurs-conference%2F&psig=AOvVaw1EjdHsUkf-ArzZ0NdJxUqU&ust=1570974486909349

cette image est ma favorite.

https://www.google.com/url?sa=i&source=images&cd=&ved=2ahUKEwiR6r3H75blAhUO_KQKHZZgBmUQjRx6BAgBEAQ&url=https%3A%2F%2Fwww.rts.ch%2Fplay%2Fradio%2Fcqfd%2Faudio%2Fbeaux-les-cristaux-le-cristallier-et-la-grotte-aux-cristaux%3Fid%3D10078104&psig=AOvVaw2yrkn-eBkVnWTK0RJ-WVvL&ust=1570974852790810 https://www.google.com/url?

Certains cristaux poussent en pointe.

sa=i&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwjovq2g8JblAhUDIMUKHdTuAUYQjRx6BAgBEAQ&url=%2Furl%3Fsa%3Di%26source%3Dimages%26cd%3D%26ved%3D%26url%3Dhttps%253A%252F%252Fwww.philippe-crochet.com%252Fgalerie%252Fmonde-souterrain%252Fdetails%252F44%252Fcristaux%252F235704%252Fsp-14-0623-grotte-d-en-gorner-pyrenees-orientales-cristaux-de-calcite-au-fond-d-un-gour%26psig%3DAOvVaw3EMbzf7X42p6PYuwFKJ24G%26ust%3D1570975041313378&psig=AOvVaw3EMbzf7X42p6PYuwFKJ24G&ust=1570975041313378

IMAGES :

cristal

https://images.squarespace-cdn.com/content/v1/5d2a2f18a14008000179203b/1563372045610-PS7HXDVWL58SMVP1ZXTU/ke17ZwdGBToddI8pDm48kNhYeViQcRtVP88JD8wJKisUqsxRUqqbr1mOJYKfIPR7LoDQ9mXPOjoJoqy81S2I8N_N4V1vUb5AoIIIbLZhVYy7Mythp_T-mtop-vrsUOmeInPi9iDjx9w8K4ZfjXt2druTumnXya-WI2ni18mGLWrUpGIk8pRXUO2gL22qMhLYm4bjm9DAHF2kOsIZRJKXnA/bandeau%2B10%2Bx%2B7.jpg

Schemas

https://www.kissclipart.com/chemical-precipitation-clipart-precipitation-chemi-04f9zl/

ruby

https://images-na.ssl-images-amazon.com/images/I/51KEsgYxmwL._UY395_.jpg

quartz

https://pt.aliexpress.com/item/2036401262.html