Subject: How to Differentiate a Sapphire Crystal from a Mineral Crystal
Posted by GrizzlyMambo on Mon, 03 Oct 2005 22:26:09 GMT
URL: http://forums.timezone.com/?t=rview&th=523164&goto=1473595
There are two fool-proof tests to differentiate a sapphire crystal from a
mineral crystal:
1) the colour test - look at the edge of the crystal. A sapphire crystal will
have a pinkish hue, a mineral crystal will have a greenish hue.
2) the water test - place large drops of water on the crystal, then tilt the
watch and watch the water slide off. On the sapphire crystal, water will easily
slide off - leaving small well-formed round globules of water on the surface.
On the mineral crystal - most of the water will "stick" to the crystal and the
drops of water will spread across the surface of the crystal to form a
non-uniform "puddle" instead of sliding off.
Try both tests on watches you know have sapphire crystals or mineral crystals
and the results will become immediately apparent to you. Test number 1 doesn't
always work if the edge of the crystal is not a clear polished finish (instead
an opaque powder finish) - and can be confusing before a comparison test is
performed.