In order to make these you need to have Sand 
(see the chapter on sand mining) and have a GM alchemest that has read the book on crafting glass. This book is purchasable in the Gargoyle city in the new lands of Ilshnar, or from another player that has purchased them there (I bought a few from other players over www.tradespot.net and I bought some more from checking player run vendors one afternoon).
There are literally a TON of new things that are craftable, my hats off to the dev team!
A second point of gratitude from rares hunters to the dev team, is that the craftable rares have (for the most part) already been given different titles from actualy "rare items"
Because of the different titles existing rares hold their present market value and new markets for their craftable counterparts have been created for miners (sand) alchemests (crafting) and home owners as buyers of the items. Everybody wins with this one.
