Caring for cloisonné and quartz jewelry requires specific considerations due to the delicate nature of cloisonné enamel and the properties of quartz.

Cloisonné jewelry care
Cloisonné is a technique of creating intricate designs on metalwork by filling compartments (cloisons) with enamel, which is essentially powdered glass that is then fired to fuse to the metal.
Avoid harsh chemicals:
• Never use chemical or abrasive cleaners on cloisonné, as they can etch or discolor the enamel.
Gentle cleaning:
• Wipe gently with a soft, lint-free cloth, possibly dampened with plain water or a very small amount of mild soap, then immediately dry thoroughly. Soaking should be avoided as it can cause damage if liquid seeps into small gaps within the enamel.
Prevent scratches:
• Store your cloisonné pieces separately in a soft pouch or lined box to protect the enamel from scratches from other jewelry.
Avoid impact:
• Cloisonné enamel is delicate and can chip or crack if dropped or subjected to impact.
Limit exposure to moisture and humidity:
• Keep your cloisonné jewelry away from prolonged exposure to moisture, as it can loosen the metalwork and cause damage or decay.
Heat sensitivity:
• Avoid extreme temperature changes or excessive heat (like saunas), as they can cause the enamel to expand or crack, notes tonyabutchercloisonne.com.

Quartz jewelry care
Quartz is a popular gemstone and is relatively durable with a Mohs hardness of 7, meaning it is resistant to scratches but can be chipped or cracked with significant impact, especially around edges or with very thin pieces.
Avoid harsh chemicals:
• Like cloisonné, quartz should be kept away from harsh chemicals or cleaning products that could potentially damage the stone or its setting.
Gentle cleaning:
• Clean quartz jewelry with a soft cloth and warm water, using a few drops of mild soap if necessary. A soft brush (like a baby toothbrush) can be used to gently clean around prongs or intricate designs.
Rinse thoroughly and dry:
• Rinse the jewelry thoroughly to remove any soap residue, and dry it completely with a soft, lint-free cloth to prevent water spots.
Store carefully:
• Store quartz jewelry in a soft pouch or lined box to prevent scratches from other jewelry items.
Limit sun exposure for some varieties:
• Some varieties of quartz, like rose quartz and amethyst, can fade in color with prolonged exposure to direct sunlight. Store these types in a cool, dark place to preserve their color.
Avoid ultrasonic and steam cleaners:
• Ultrasonic and steam cleaners can be too harsh for many gemstones and may cause damage, so it is best to avoid using them, according to http://www.millianna.com.

In summary, both cloisonné and quartz jewelry benefit from gentle cleaning methods, careful handling to prevent scratches or damage, and proper storage to maintain their beauty and integrity. By following these guidelines, you can ensure your beautiful jewelry pieces remain in excellent condition for years to come.