Green milgauss crystal question...

[entropydave]

I've been told that the green crystal on the Milgauss does NOT have the laser etched crown in it.

I was told 'technical reasons' - I can't see why it cannot be done - is this true?

Settle this argument between my son and I!

Thank you.

[hambone1983]

I don't know why the green sapphire can't be etched, but I can confirm they aren't, if that was part of your question

[entropydave]

Originally Posted by hambone1983

I don't know why the green sapphire can't be etched, but I can confirm they aren't, if that was part of your question

Wow! I'm amazed! So why not?!

[DLRIDES]

The green crystals are NOT etched.

[entropydave]

My 16 year old wins. Again. Bugger, he's often too right!

[JerseyGuy]

Originally Posted by hambone1983

I don't know why the green sapphire can't be etched, but I can confirm they aren't, if that was part of your question

1+ My GV does not have it.

[hambone1983]

Originally Posted by entropydave

Wow! I'm amazed! So why not?!

no clue

[entropydave]

So what's Rolex's reason then? I mean, it could be, couldn't it?

[underpar31009]

I own it and it does not have it. I heard the crown etching would be distorted due to the way the crystal is made.

[DLRIDES]

Originally Posted by entropydave

So what's Rolex's reason then? I mean, it could be, couldn't it?

Since the crystals are etched with a laser, the green may create some type of reflectivity issue within the laser ???????????

[entropydave]

Originally Posted by underpar31009

I own it and it does not have it. I heard the crown etching would be distorted due to the way the crystal is made.

They can make the crystal boules from either drawing from a melt of doped alumina and I also read that they could make them by a hydrothermal process (which I am somewhat surprised but it'y hardly my area of expertise!

I also hear that they cut the boules on the bias to avoid cleavage planes and thus preserve a degree of impact toughness, so I would have thought that the trace elements (iron? vanadium or whatever - probably a secret) which are added in minuscule amounts wouldn't affect the physical properties of the crystal slice.
My 0.02" worth...

[entropydave]

sorry repeat thread :(

[entropydave]

repeat thread

[underpar31009]

Originally Posted by entropydave

They can make the crystal boules from either drawing from a melt of doped alumina and I also read that they could make them by a hydrothermal process (which I am somewhat surprised but it'y hardly my area of expertise!

I also hear that they cut the boules on the bias to avoid cleavage planes and thus preserve a degree of impact toughness, so I would have thought that the trace elements (iron? vanadium or whatever - probably a secret) which are added in minuscule amounts wouldn't affect the physical properties of the crystal slice.
My 0.02" worth...

Very good information! Thanks for sharing. I love this stuff...always learning from TRF!

[CRM114]

Originally Posted by entropydave

They can make the crystal boules from either drawing from a melt of doped alumina and I also read that they could make them by a hydrothermal process (which I am somewhat surprised but it'y hardly my area of expertise!

I also hear that they cut the boules on the bias to avoid cleavage planes and thus preserve a degree of impact toughness, so I would have thought that the trace elements (iron? vanadium or whatever - probably a secret) which are added in minuscule amounts wouldn't affect the physical properties of the crystal slice.
My 0.02" worth...

I thought Milgauss glass was green because it's made from Kryptonite and thus renders the power of Rolex lasers ineffective and weak in the same manner it does to Superman's Heat-ray/X-ray vision.

But I suppose a case could be made for your theory as well.

[Andad]

I am sure Rolex busted some bubbles on GV crystals.

Could be they just didn't like the way they looked.

And it's not an etching.

Right Megan?

[Swiss Mad!]

Obviously a laser is a very intense light beam focused into a miniscule point of contact.
It etches by burning away the material it is focused on.
Maybe this intense heat in someway affects the green coating on the crystal?
Just a guess - could be miles out.


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[Tom808]

I have one and it does not have the etching. I heard that the green color will bleed out the etching. That would be slightly distracting. I also heard the glass was too brittle to etch. Who knows?

[Andad]

Originally Posted by Swiss Mad!

Obviously a laser is a very intense light beam focused into a miniscule point of contact.
It etches by burning away the material it is focused on.
Maybe this intense heat in someway affects the green coating on the crystal?
Just a guess - could be miles out.


Sent from my Moto G (4) using Tapatalk

The focussed lasers creates a bubble of molten glass.

There are about 152 of these bubbles that make up the crown and it is formed about half way through the crystal thickness.
There is no green coating on the crystal.

[Swiss Mad!]

Originally Posted by directioneng

The focussed lasers creates a bubble of molten glass.

There are about 152 of these bubbles that make up the crown and it is formed about half way through the crystal thickness.
There is no green coating on the crystal.

Ok, cheers

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[GMT Aviator]

I would have thought the green on the crystal is caused by the gasket?

And like those 3D laser etched blocks, the LEC will reflect green from light entering the crystal from the sides giving the appearance of a glowing green LEC from certain angles.

That’s my guess.

[Andad]

No it is not green by way of a green gasket.

The green tint is all the way through the sapphire glass.

That is why it looks a darker green around the outside where the crystal is thickest down to the case.

[omx5o]

Perhaps it was too easily visible and distracting, rather than being a hidden feature.

[tyler1980]

if the crown is a subtle way to verify authenticity of sapphire crystal as genuine Rolex, maybe because its green they didn't see a need. Not a lot of fake green sapphire crystals out there vs. clear.

Just a guess.

[SamP]

Originally Posted by hambone1983

I don't know why the green sapphire can't be etched, but I can confirm they aren't, if that was part of your question

Strange, my Lorex Limgauss green sapphire is etched!
I bought 5 for $50. Might it be fake?

In the ovoidence of doubt - this is a light hearted spoof joke response.
I don’t have a Milgauss.
Regards

[Zakalwe]

In isolation, the crystal looks rather insipid.




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[Jocke]

There is some technical issues with the green crystal to do the laser engraving. The crystal is harder than a regular and Rolex have
some problems when they release the GV model, the crystal broke when they put it in the case.

Here is some info about it.



And here is little about the famous S.

[chrisb57]

I Must say, something so small to the naked eye. Is made up from 152 lasered bubbles .
It really never ceases to amaze what Rolex will do . To keep us all enamoured by this brand.

[entropydave]

thank you - some very good info there! I still don't know why they 'can't' etch it... .it's still fused alumina - all I can think is that the highly focussed laser that they use to do the etching might discolour the surrounding material - so instead of a crown, one might see a a discoloured blob with the crown in - would look like a dirty sub-mm spec embedded in the crystal - which would really bug the owner...
Anyone got a spare green crystal we could experiment on?!