MORE INFO : Latticino marbles are made in a variety of series only 2 or 3 times a year. Please contact us for current availability. Thanks. If you want to learn more about contemporary marbles, you may want to check out two websites- Bertram Cohen (http://www.marblebert.com) and Mark Block (http://www.blockglass.com).So Glad You Asked’Ä¶ Latticino marbles were one of the earliest glass objects Harry learned to make. Also, the first gift given to me during our courtship.