| Tony Wigg wrote on 04/03/09 Harry Powell writes in his Glass-Making in England that Powell's introduced the colourless Venetian milky opal in 1862 which predates straw opal and blue opal by over a decade |
| brian wrote on 14/11/04 However Powell [1928] indicates opal about 1877-1879 but seemingly using a flint glass already in production. |
| brian wrote on 14/11/04 See Evans p254 plate 355 for similar shape glass [catalogue 1860] See Evans p226 .She indicates opal was in use as early as 1860.This could be a very early example of opalising. |
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