Which gem may fade quickly in direct sunlight?

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Study for the DCA Gemology Test. Utilize flashcards and multiple-choice questions, each question offering hints and explanations. Prepare effectively for your exam with confidence!

Multiple Choice

Which gem may fade quickly in direct sunlight?

Explanation:
Direct light sensitivity of color is being tested here. Kunzite’s pink to lavender color comes from trace manganese color centers that are easily broken down by ultraviolet radiation. When exposed to direct sunlight, these color centers fade, so the stone loses its intensity quickly and can appear much paler or near colorless. Sapphire and diamond have colors that are highly resistant to sunlight, so they don’t fade under sun exposure, and opal can be unstable in various ways but isn’t as predictably prone to rapid fading as Kunzite. So Kunzite is the gem most likely to fade quickly in direct sun.

Direct light sensitivity of color is being tested here. Kunzite’s pink to lavender color comes from trace manganese color centers that are easily broken down by ultraviolet radiation. When exposed to direct sunlight, these color centers fade, so the stone loses its intensity quickly and can appear much paler or near colorless. Sapphire and diamond have colors that are highly resistant to sunlight, so they don’t fade under sun exposure, and opal can be unstable in various ways but isn’t as predictably prone to rapid fading as Kunzite. So Kunzite is the gem most likely to fade quickly in direct sun.

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