Easy scratch test at home for finding diamonds with normal glass and corrundum - Смотреть видео или скачать видео в MP4, музыку MP3 на телефон или компьютер
• Identify water source
• Predict depth
• Provide recommendations of utilizing a bore well versus wells
• Identify false readings which are caused due to black rock
• Waste water management
• Rain water harvesting
Gem Stone Testing