Virtually all (if not all) strands will have some imperfections, gandkbenson. Also, like all pearl vendors, Mikimoto offers differing grades of pearls.
Give them a chance, wear them under different lighting conditions. I find that white pearls don't generally look their best in bright daylight.
Here are instructions for uploading photos from your computer (I don't have a smartphone so can't describe how to upload from one):
1. Click on Go Advanced, then Manage Attachments. This opens a small window, the File Upload Manager.
2. Click the green + button to "Add files".
3. Click "Choose File". This opens a large window to your computer files. Find the photo file you want to upload.
4. Highlight the one you selected and Choose it. The large window will go away.
5. On the small File Upload Manager window you should now see the name of the file you have chosen. Click "Upload".
6. Next to Manage Attachments you should now see the name of the photo you have uploaded.
7. If you have more photos to upload, repeat the process-- click "Choose File" on the small File Upload Manager window, etc.
8. When you are done uploading, click Preview Post to see your post, or just Submit.
9. If you want to add more photos or remove photos later, return to Manage Attachments.