Natural Spinel oval weighing 4.56 cts from Tanzania (SN10043aa) @ [ Ссылка ]
Spinel is a favorite of gem dealers and gem collectors due to its brilliance, hardness and wide range of spectacular colors. Vivid traffic light red and cobalt blue are the most expensive colors for spinel and nice stones over 3cts. in size are always a rarity. Top quality red spinels display superb bright and saturated red colors that actually fluoresce, or glow, in natural light. Pure colorless natural spinel is extremely rare and natural white spinels always show a trace of pink. Star spinels are found occasionally and they may display either four or six rays depending on their orientation
