The color enhancement processes are highly durable and won’t reverse or alternate under normal wear and tear. One can prevent any miss happening by maintaining some instructions which are easy to follow.

Irradiated Diamonds

Leshem irradiated diamonds are absolutely safe to use, and require no special attention under normal wear and tear. The color treatment is permanent, and not subject to change over time.

The following is important information on handling irradiated diamonds:

• Cleaning – There are no limitations on cleaning irradiated diamonds, and any form of cleaning is safe (i.e. ultrasonic, acid, jeweler’s cleaners or steam cleaning). The diamonds can be cleaned at home by using soap and a toothbrush.
• Setting – Irradiated diamonds can be set in all setting techniques, with the exception of a “wax-set”, as it involves high temperatures. Bezel-set, invisible-set, channel-set, prong-set and flush-set are highly suitable in setting irradiated diamonds.
• Temperature exposure – An irradiated diamond should not be exposed to temperatures over 450º (900ºF). When resizing an irradiated diamond ring, the diamond should be protected from being exposed to very high temperatures. The jeweler can use a few techniques in order to protect the diamond, such as covering the diamond with a saturated mixture of boric acid and denatured alcohol.

HPHT Diamonds

Diamonds that have gone through the HPHT enhancing process require absolutely no special attention, and are safe to use under all conditions while maintaining their durability.

The following is important information on handling HPHT enhanced diamonds:

• Cleaning - There are no limitations on cleaning HPHT enhanced diamonds, and any form of cleaning is safe (i.e. ultrasonic, acid, jeweler’s cleaners, or steam cleaning). The diamonds can be cleaned at home by using soap and a toothbrush.
• Setting – HPHT enhanced diamonds can be set in all setting techniques (i.e. Bezel-set, invisible-set, channel-set, prong-set, flush-set and wax set).

HPHT enhanced diamonds can be subjected to high temperatures.

Coated Diamonds

Coated diamonds are highly durable under normal wear and tear, however, should not be exposed to very high temperatures, or heavy acids.

The following is important information on handling coated diamonds:

• Cleaning – The coated diamonds can only be cleaned by soap and water, or steam cleaning. They can not be immersed in ultrasonic water or acids for long durations of time.
• Setting - coated diamonds can be set in all setting techniques, with the exception of a “wax-set”, as it involves high temperatures. Bezel-set, invisible-set, channel-set, prong-set and flush-set are highly suitable for setting coated diamonds.
• Covered pavilion designed rings – By choosing to set the coated diamond in rings with a covered pavilion design, one can ensure the durability of the coating, as it is done only at the pavilion facet junction. By protecting the pavilion from exposure to any sort of heat or cleaning procedures, the color will remain the same.

Here is a useful chart on coated diamonds treatment and care: