Well, if you actually want glass weapons, then here. I did this a while back when I was playing with reactions, it's a bit of a cheat some might say, as it's potentially an endless supply of low value metal for training weapons, furniture, bins etc. It's also magma resistant too. It could easily be changed to use clear glass rather than green, it would certainly make things a little less of a no-brainer.
Put this in reaction_standard
[REACTION:BAR_GLASS_GREEN]
[NAME:make green glass bar]
[SMELTER]
[REAGENT:1:BLOCKS:NO_SUBTYPE:GLASS_GREEN:NO_MATGLOSS]
[PRODUCT:100:1:BAR:NO_SUBTYPE:METAL:GLASS]
[FUEL]
and this in matgloss_metal
[MATGLOSS_METAL:GLASS]
[NAME:glass][ADJ:glass][COLOR:7:3:0]
[VALUE:2]
[SPEC_HEAT:500]
[MELTING_POINT:12718]
[BOILING_POINT:14968]
[WEAPON]
[DAMAGE_PERC:50]
[BLOCK_PERC:50]
[SOLID_DENSITY:7850]
Alternatively you can add this to most of the metals in matgloss_metal. Not quite such a blatant cop-out as glass bars.
[WEAPON][WEAPON_RANGED][AMMO][DIGGER][ARMOR]
[DAMAGE_PERC:50]
[BLOCK_PERC:50]
That'll let you make things like lead warhammers and gold platemail which are about as effective as wooden equipment. It can be good for fun though. I did this too, on the basis that there's no reason why anyone should be prevented from making things out of silly metals, but that's not going to say that the proverbial lead warhammer is going to be anything more than medicore in combat. You could make those numbers even lower for some metals, I think my gold is something like 40. Mind you, doing this will cause some silly occurances in adventure mode, and you'll find chaps trying to sell you zinc longswords.
Just the results of my fiddling about, but it gives you more options than vainly plugging the ground for silver.