This is a Pin in circle icon. We've made it in iOS style, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,000 icons, all in the same style and quality.
This is a basic icon of a push pin, the kind with the plastic part you push on and is easier pulled out. The plastic part looks like an hourglass shape with how it narrows in the middle. The whole push pin is tilted 45 degrees. Around the push pin is a circle.