judging from the picture, it does appear to be a glass encased diode (as opposed to a plastic cased, which are more common these days).
as for the type, I cant help ya there. if you had another ignitor you may be able to get more info. but in many cases, these diodes are unmarked. Especially true of the older glass diodes.
A resistor will have at minimum 3 bands of color, if its following the standard color coding. it may have more, but the standards allow for that.