18 Articles on gemstones

We are looking for 18 articles (14 articles of 500 words each at least and 4 articles of 250 words) on gemstones with a focus on characteristics, unique features, history/mythology, and location primarily found/mined. We need original articles only. Creative, well written 100% grammatically correct, EASY and interesting to read. Articles shall be checked on Copyscape for duplicates. No copied or rewritten material will be tolerated. No articles should be written with software or content spinners, or taken from existing articles. (It will be checked) We retain FULL RIGHTS to all articles we are purchasing. We want the articles to be well researched, well written, and interesting and original. Ongoing article writing to the winning provider is possible (depends on his/her knowledge). NOTE: No bid without sample article will be entertained.