Not sure what type of setting you need?
If you are not sure what type of setting you need for gemstone. We are here to help. First you need to know what type of cut your gemstone is. Is it faceted of cabochon (cab)? You cannot use a cabochon setting for a faceted cut gem or a faceted cut gem for a cabochon. This Is the #1 problem customers have because they are not educated about the difference between cabochon and faceted cut gemstones.
In this picture you have a 16x12mm faceted cut gemstone with a 16x12mm pre-notched basket setting. A faceted cut gemstone is gemstone that has multiple facets (cuts). In simple terms they have a pointed back . A diamond is a faceted cut gemstone. With faceted gemstones you would use pre-notched basket setting or snap tite settings. When you look at the 2 you may say " This gem will not fit this setting, the gem is much bigger than the setting". When you set your gemstone the prongs will expand out to fit the faceted gemstone for a secure fit. If you tried setting a faceted gemstone in a cab setting you will find out it will not work because the faceted gemstone has a pointed back and is too deep.
Click the link below to see the picture larger