3.33ct Pair of Round Faceted Sapphires 7.4mm Renata Essence 90oz （10pcs)

90oz （10pcs)

Cut tubes and wires to perfect angles with a flush using the angled tube cutter

Metal movement holder for hand setting and chronograph function checking

Helping Hand with Crocodile Clip

Switching Time (Bright to Dark): 1/10000s (Normal Temperature)

3.33ct Pair of Round Faceted Sapphires 7.4mm Renata Essence 90oz （10pcs)Sapphire is a variety of the mineral corundum, an aluminium oxide. It is typically blue but fancy coloured sapphires also occur in orange, yellow, green, brown, purple, pink, black and colourless. Red and reddish pink coloured corundum is referred to as ruby. The variety in colours is due to trace amounts of elements such as iron, titanium, chromium, copper and magnesium. Mohs Scale of Hardness: 9 (out of 10). Sources: Mines that have yielded the