Screen-I is a portable diamond verification instrument designed for smart testing of Natural Diamonds (Type Ia) from Synthetic Diamonds HPHT / CVD (Type IIa) from Colourless to Near Colourless ( D to J ). It’s capable of checking the mounted stones (mounted jewellery with under hole only). Screen-I is manually operated but gives an automatic test result. Moreover, it lasted around 150 hours on heavy use for more enjoyable testing.