These are 4.2mm jade earrings purchased from Victorianbox. The jade is surrounded by cubic zirconia. I took the photos indoors at night to prevent them from appearing brighter than they are in reality, so the pictures are a bit dark. These have silver posts and are ready to wear as earrings. After purchase, I only took them out of the case occasionally to admire them at home. However, please understand that these have been owned by someone other than the original seller, so they are not the same as brand new earrings purchased from a store. I will send them in the black case (pictured) that they came in. Please feel free to comment if you have any questions. ^_^