Does the crystal/glass contain lead?

I have not actually seen this product, but I do find it confusing that they say it is K9 crystal, but ... when you look up the definition of what K9 crystal IS (Wikipedia), the 9 = 9% lead. So... I am tempted to say that if it is lead free, it should not claim to be K9, but rather just borsilicate glass. That doesn't make it bad, just not K9. Flip this around and ask... for most applications, what is the problem with lead in the crystal for a prism anyways, you're not going to use it to stir coffee...

Has anyone tried to make a rainbow through this with a flashlight?

Most modern flashlights don't actually produce every color of light, in order to make them more energy efficient. The exception is old fashioned, cheap incandescent.

OK I give up, I have tried 2 of these "crystals" and neither one of them would produce a "rainbow" of light, only white light???

Please make sure you are using natural sunlight. Artificial light won't produce the desired effect.

Amlong Crystal 6 Inch Optical Glass Triangular Prism For Teaching

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Description

🌈 Unlock the magic of light — where science meets style!

READY OUT OF THE BOX - No assembly needed—just unpack and start exploring the wonders of light immediately.
GENEROUS 6 INCH LENGTH - Designed for a stable handheld grip and stunning visual displays, perfect for desktop elegance or classroom use.
VIBRANT SPECTRUM DISPLAY - Transforms ordinary light into mesmerizing rainbows, making physics lessons and creative projects unforgettable.
ELEVATE YOUR SPACE STATUS - A sleek, elegant prism that doubles as a conversation-starting decor piece for your home or office.
PRECISION CRAFTED OPTICAL GLASS - Experience crystal-clear light refractions with premium lead-free K9 glass, elevating your science demos and photography.

The Amlong Crystal 6 inch Optical Glass Triangular Prism is a high-quality, lead-free K9 glass prism designed for educational and photographic use. With a stable 6-inch length and crystal-clear clarity, it creates vibrant light spectrums and rainbows, perfect for science demonstrations or artistic displays. Packaged securely and ready to use, it adds both functional and aesthetic value to any professional or creative environment.

Specifications

ASIN	B00FHFV9AI
Age Range Description	Kid
Best Sellers Rank	#40,897 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #253 in Science Education Supplies
Brand Name	Amlong Crystal
Color	Silver
Customer Reviews	4.6 out of 5 stars 3,298 Reviews
Educational Objective	Demonstration of light wave principles
Indoor Outdoor Usage	Indoor
Is Assembly Required	No
Item Weight	9.99 ounces
Manufacturer	Amlong Crystal
Manufacturer Maximum Age (MONTHS)	120
Manufacturer Part Number	AMPR10060-1
Material Type	optical glass
Model Number	AMPR10060-1
Number of Players	1
Operation Mode	Manual
Power Source	Manual
Size	Small
Supported Battery Types	No batteries required
Theme	science education
UPC	855271005588
Unit Count	1.0 Count

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