[Jewelry making - Article 00818] - [Orchid] Ring around the rosie

[Devora Evgi]

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Hi,

    I don't usually make custom rings (or any rings). Yesterday, a woman
    walked in and fell in love with a hollow ring I designed and made a
    while back. (I have most of my workshop trials and tribulations on
    display, as conversation pieces.) So, I measured her for a Size 9
    and told her I would give her a cost estimate. 

    Questions: 

    1. Is there a chart that indicates the length of metal I would have
    to saw out for a particular ring size? And, should the length be
    exact, or longer/shorter than denoted? 

    2. Is there a chart that would enable me to figure out total surface
    weight without actually weighing something? For example, a 1 x 1
    inch of whatever gauge sterling silver always weighs X grams. 

    3. Are there any pitfalls I need to avoid when making a ring/hollow
    ring? 

    4. On the ring mandrel, do I size the ring on the sizing mark - on
    the top, middle or bottom of the ring? 

Thank you *very* much and keep shining,
Devora
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