Diamonds Element 3D Logo Text Reveal V2 by iconoclast on CGguy
https://elements.envato.com/diamonds-element-3d-logo-text-reveal-v2-V7BL8HS
Free 
Gems & Lights – Gemstones Logo Reveal Pack by microzooms on CGguy
https://elements.envato.com/gems-lights-gemstones-logo-reveal-pack-VDTYJ8Z
Free