3D Model: Create A 3D Location Pin Icon With An Old Rock-style Texture, Resembling Aged Stone Or Cracked Concrete. The Primary Color Is Green (#a2c037) With Black Outlines And Contours. The Icon Should Have Realistic Lighting And Shadow Details To Enhance The Sense Of Depth And Rotatability. Add Subtle Wear, Roughness, And Slight Grunge To The Surface, Keeping The Old-school Rock Aesthetic. The Icon Should Be Isolated On A Transparent Or Neutral Background.