Articles needed-20

I need 20 articles of 500-700 words on various? topics related to gem and jewelry industry. ## Deliverables I need 20 articles of 500-700 words on following topics. how to identify a geode history of a sapphire where are emeralds found ? what is a geode ? what are the different types of coral? where are sapphires found ? what is beryl history of alexandrite gemstone history of aquamarine gemstone How to identify an aquamarine gemstone how to identify alexandrite gemstone how to identify a coral how to identify a pearl how do crystals form ? how are synthetic diamonds made ? how to identify yellow sapphires how to identify ruby where are rubies found history of opal gemstone tips to photograph jewelry.. I can give little guidelines on what to write on each topic. but the topic has to be researched thoroughly and no duplicates please.