Random Size Diamonds logo reveal
https://elements.envato.com/random-size-diamonds-logo-reveal-EZF2GD5
Free 
Luxario – Jewelry Powerpoint Template
https://elements.envato.com/luxario-jewelry-powerpoint-template-5PNSM9Q
Free 
Luxario – Jewelry Google Slides Template
https://elements.envato.com/luxario-jewelry-google-slides-template-H7QF426
Free 
Diamonds Explosion Logo Reveal by iconoclast on CGguy
https://elements.envato.com/diamonds-explosion-logo-reveal-VWXN4AE
Free