Mineral vs Hardex crystal

Mineral vs Hardex crystal

Joined: November 2nd, 2003, 1:19 pm

November 2nd, 2003, 1:19 pm #1

Interested in a Citizen or Seiko diver watch but unsure about the kind of crystal to stick with...most of the non-Seiko's have mineral crystal while the Seikos have Hardexx ?...Is there that much of a difference or concern.. I also see that the Seiko models (007's) have a changeable crystal and Bevel.
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Joined: September 2nd, 2002, 2:48 pm

November 2nd, 2003, 3:07 pm #2

Hardlex is Seiko's version of mineral crystal. So there should be no or minimum difference. You can buy stock 007 crystal and bezel, or aftermarket crystal (sapphire) and bezel, these are easy to find.

reynaert
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Joined: June 16th, 2002, 5:41 pm

November 2nd, 2003, 6:10 pm #3

Interested in a Citizen or Seiko diver watch but unsure about the kind of crystal to stick with...most of the non-Seiko's have mineral crystal while the Seikos have Hardexx ?...Is there that much of a difference or concern.. I also see that the Seiko models (007's) have a changeable crystal and Bevel.
just say no to mineral, unless you don't mind a few scratches on your crystals.

i can't stand even microscratches on a crystal unless the watch is a class A beater....i.e., my g-shock.

here are my sport watches....

the seiko diver has a sapphlex crystal and is used as a work watch. there's not even a microscratch on the sapphlex crystal, which has worn like sapphire for me.

the tudur has a thick acrylic crystal that is easily buffed and the citizen is sapphire.

ed rader

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Joined: August 12th, 2003, 2:19 am

November 2nd, 2003, 6:58 pm #4

Hardlex is Seiko's version of mineral crystal. So there should be no or minimum difference. You can buy stock 007 crystal and bezel, or aftermarket crystal (sapphire) and bezel, these are easy to find.

reynaert
If there's hardly any difference between mineral glass and Hardlex, then why does Seiko make this a distinction in their product line?
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Joined: June 16th, 2002, 5:41 pm

November 2nd, 2003, 7:04 pm #5

hardlex is seiko proprietary mineral.

ed rader
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Joined: November 6th, 2002, 1:27 am

November 2nd, 2003, 7:14 pm #6

just say no to mineral, unless you don't mind a few scratches on your crystals.

i can't stand even microscratches on a crystal unless the watch is a class A beater....i.e., my g-shock.

here are my sport watches....

the seiko diver has a sapphlex crystal and is used as a work watch. there's not even a microscratch on the sapphlex crystal, which has worn like sapphire for me.

the tudur has a thick acrylic crystal that is easily buffed and the citizen is sapphire.

ed rader

just like yours and I love the sapphire too. The
duratect is like a scratch repeller -- the bracelet
is almost in mint condition after months of use.
John.
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Joined: August 12th, 2003, 2:19 am

November 2nd, 2003, 8:48 pm #7

hardlex is seiko proprietary mineral.

ed rader
old mineral glass with regards to scratching?

If not, I think it's devious marketing at best.
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Joined: October 26th, 2003, 6:44 pm

November 2nd, 2003, 9:43 pm #8

Hardlex (also known as Mineral-A in some markets) is Seiko's proprietary glass produced from a mixture of barium and silicon. According to Seiko, it is more scratch resistant than ordinary mineral glass, but still not as durable as Sapphire, which is 3 times as hard as Hardlex. (You practially need a diamond to scratch a sapphire crystal. A friend of mine still wears his 22-year-old Seiko Lasalle everyday, and while the case and bracelet are showing some age, the sapphire crystal is as clear as the day he bought it.)
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Joined: June 16th, 2002, 5:41 pm

November 2nd, 2003, 10:31 pm #9

it ain't hard enough for me.

i've handled at least a hundred used seikos with hardlex and most have had marks on the crystal and many of these watches were relatively new.

i've never seen a sapphire crystal that was scratched, though i know it happens nor have i seen a scratched sapphlex crystal...

i've heard the seiko spin on hardlex but it hasn't convinced me.

ed rader
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Joined: June 16th, 2002, 5:41 pm

November 2nd, 2003, 10:32 pm #10

old mineral glass with regards to scratching?

If not, I think it's devious marketing at best.
aaa
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