Vibrant rainbow effects
Precision-ground K9 optical glass splits light into vivid rainbows with a 3' angle tolerance.
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Why customers love it
Turn ordinary light into vivid rainbows
This precision-ground 20mm optical glass cube splits ordinary light into a brilliant spectrum of rainbow colors, making it a captivating tool for science, photography, or desk display.
- Precision-ground K9 optical glass for crystal-clear light refraction
- Splits light into vibrant rainbows with a 3' angle tolerance
- Compact 20mm cube design – easy to hold, display, or use in experiments
- High surface quality (60/40) ensures brilliant clarity and minimal distortion
- Versatile for physics demonstrations, photography effects, or decorative accents
Why you'll love this optical glass cube
Crystal-clear clarity
High surface quality (60/40) ensures brilliant clarity and minimal distortion.
Versatile use
Perfect for physics demonstrations, photography effects, or as a unique decorative accent.
Compact and gift-ready
The 20mm cube is easy to hold, display, or use in experiments, making it a thoughtful gift for curious minds.
Specs
The details that matter
- Material
- K9 optical glass
- Size
- 20mm cube
- Surface quality
- 60/40
- Angle tolerance
- 3'
More details
This precision-cut optical glass cube transforms ordinary light into a stunning spectrum of rainbow colors. Perfect for science enthusiasts, educators, or anyone who loves beautiful optical effects.
- Precision-ground K9 optical glass for crystal-clear light refraction
- Split light into vibrant rainbows with a 3' angle tolerance
- Compact 20mm cube design – easy to hold, display, or use in experiments
- High surface quality (60/40) ensures brilliant clarity and minimal distortion
- Versatile tool for physics demonstrations, photography effects, or decorative accents
Ideal as a thoughtful gift for curious minds or as a unique addition to any desk or shelf.
Frequently asked questions
Everything you might want to know before you order.
How do delivery and returns work?
Shipping
Free standard shipping
To Germany: 1–3 business days processing, then 5–12 business days in transit. Estimates, not guaranteed dates.
Your dispatch email includes a tracking link. Contact us if it has not arrived within 5 business days of ordering.
Outside the EU, import duties and local taxes may be payable on delivery. See the shipping policy for supported destinations and conditions.
Returns
Request a return within 14 days of delivery. Standard eligible returns must meet the policy conditions; a €4 prepaid-label fee is deducted from the refund. Return shipping is free for faulty, damaged or incorrect items. Contact us promptly if something is wrong. Your mandatory consumer rights are unaffected.
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