The DiamondSure compact screening device is designed to distinguish natural diamonds from synthetics and simulants.
Loose polished stones can be tested in the 0.05ct to 10ct size range. The instrument is intended for colourless or near-colourless stones, although it will distinguish yellow synthetics from natural cape yellow stones. Other fancy colours will give a high referral rate and are therefore not recommended.
The sample is placed table down on the fibre optic probe and the test button is pressed. Around 98 per cent of colourless or near-colourless stones will pass and will require no further examination. All synthetics, simulants and around two per cent of natural diamonds (Type II and IaB) will be referred for further tests. These referred stones can then be tested on the DiamondView.
For stones in mounted jewellery, the sample dish can be removed to release the fibre optic probe and can be tested using the ‘Auto-detect’ feature.
DiamondSure is approximately 17cm(w), 26cm(d), 10cm(h).
The latest version of the instrument comes with a detachable probe. As long as the probe is in good contact with the stone alone, and not any surrounding metal, a measurement can be made.
This message appears if the calibration arm is not in place during start-up or the factory calibration data doesn’t match the field data. Ensure the calibration arm is in place and press the left-hand button again.
The DiamondSure makes a measurement of the light returned from the diamond under test and can detect the presence of strong overhead lighting. Either move the DiamondSure away from direct overhead lighting or move the light source if possible.
No. Replacement lamps must be purchased from the instrument manufacturer.
....and does the instrument need to be returned for servicing?
The instrument performance may not necessarily be impaired. The unit should only be returned for servicing if the referral rate for natural diamonds is noticeably high or the unit fails to initialise.
Carry out the following in sequence. Check the fibre tip is not below the white plastic disc (if it is, adjust the height). Clean the end of the fibre with alcohol (IPA) only. Replace lamp and realign. Replace fibre. Return to the manufacturer, if these actions do not remedy the problem.
The detachable probe can be used to measure stones mounted in jewellery. For stones up to 0.3ct an insert is not generally needed. The smallest insert is suitable for stones up to 0.5ct. The next size insert is suitable for stones up to 1ct, and the next size insert for stones up to 2 ct. The largest insert is suitable for stones up to 4ct.
Fibres can often be recovered for a fixed nominal fee as long as there is no physical damage or kinks to the cable. The re-polishing service offers a significant saving over purchasing a new fibre.