But if it looks like a science experiment and smells like roast beef?
Go ahead. Make that sandwich. 
Why Some Meats Show It More Than Others
Deli Roast Beef
Thinly sliced, moist, high in myoglobin (pigment that reflects light)
Ham & Turkey Breast
Smooth, cured surface enhances diffraction
Pastrami & Corned Beef
Spices and brine can amplify the sheen
Raw Fish (like salmon)
Also shows iridescence for the same reason
Rarely seen in: Ground meat, chicken breast (unless wet), or heavily marinated cuts — because the surface is too rough or uneven.
Final Thought: Nature Is Full of Hidden Wonders
You don’t need a lab coat to witness magic.
Sometimes, it’s right on your sandwich plate — a flash of green on a slice of turkey, a purple glimmer on roast beef.
That rainbow effect isn’t broken meat.
It’s muscle meets physics — proof that even something as simple as a protein-packed slice can dazzle under the right light.
So next time you see it…
Don’t panic.
Appreciate it.
Because great things — even delicious ones — can be both beautiful and edible
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