How to tell crystal from glass

Thought this was about drugs

rub the rim with a wet finger and see if it rings.

same advice hold true for figuring out if your gay.

quote:

---

rub the rim with a wet finger and see if it rings.

same advice hold true for figuring out if your gay.

---

I passed! My wife will be pleased.

+1

Probably get more responses if you change the title to "How can you tell if it's Crystal or Glass?"

As far as your question goes, flick it. If it has a low pitched, thud sounding ping, it's glass. If it has a higher pitched, more musical sounding ping, it's crystal. Crystal is usually thinner than glass and is always clearer than than glass, which is more cloudy than crystal. Crystal also produces a prism when held to light where as glass does not. Crystal is heavier than glass. If you wet your finger and run it across the rim of the cup, crystal sings ( ) in a higher pitch. While glass does sing when doing the same, the pitch is distinctively different (similar to the sound when flicking it).

All you said was correct except that glass will not sing. It does because I do it all the time. I can make a jar sing as well.

quote:

---

All you said was correct except that glass will not sing. It does because I do it all the time. I can make a jar sing as well.

---

quote:

---

Glass will produce a tone, but crystal will more easily I presume.

---

True for both but Crystal has an entirely different pitch than glass.

ETA: I edited first post for clarify and correction.

Shine a light through it.

If it makes colors, it's Crystal

quote:

---

Thought this was about drugs 

---

You're funny