Share: Title:Tanzanite: Unique Zoisite Colors by GIA Duration: 4:45 Plays: 65K views Published: 10 years ago Download MP3 Download MP4 Simillar Videos ▶️ 1:12:13 Geology 101: Natural Processes That Form Colored Gemstones | Gia Knowledge Sessions Webinar Series 65K views • 4 years ago ▶️ 5:38 Gia’s Professional Education By Gia 65K views • 9 years ago ▶️ 1:55 Natural & Lab-grown Diamonds: What's The Difference? 65K views • 6 months ago ▶️ 5:46 Gia Gemological Laboratory By Gia 65K views • 9 years ago ▶️ 4:20 How To Choose A Diamond: Four-minute Gia Diamond Grading Guide By Gia 65K views • 10 years ago