<p>I work for a jeweler and would like to weigh in on the subject of offering a family heirloom as an engagement ring. As far as I have read, the OP has not brought the ring in to be evaluated by a gemologist to verify that (1) is it in fact a diamond, (2) what is the actual condition of the stone and the mounting, and (3) what is the approximate current value of the stone.</p>
<p>A jeweler should be able to quickly diamond test the stone, to loupe the stone and mounting looking for chips, cracks, & inclusions on the stone and for broken prongs, cracks, and previous repairs to the mounting, and to measure the stone to roughly estimate the carat weight. Do this before passing the stone to the son. This stone could be an old mine cut diamond with a present value that is significantly less than a brilliant or ideal cut stone of similar carat weight, clarity, and color. The original stone could also have been lost and replaced with a faux by its original owner and never revealed to the rest of the family—yes, we have seen this happen.</p>
<p>I would seriously consider remounting the stone. Mountings do wear, prongs break, stones get lost. Intricate filigree antique-style mountings can be difficult to repair and/or expensive to restore. We recommend a 4 prong Tiffany style mounting in 14K white gold to men who dont have a clue to what their intended might want. It is not expensive and it allows the stone to show at its best and evoke that wow emotion.</p>
<p>Another subject discussed was the use of semi-precious stones as an alternative to a diamond for an engagement ring. Sapphire & Ruby, maybe. Emerald, peridot, or other semi-precious, NOjust dont. Emeralds will crack, peridot will crumble. Sapphires and rubies will chip, scratch, and show signs of wear. You need to know the hardness of the stone you are considering. While it is true that a diamond can break if it is hit in just the right spot, it is a very rare occurrence. For every sapphire ring engagement ring Ive seen come through our store for repair, I would say that 1 out of 3 is chipped. When you wear a ring everyday, it should be able to withstand the constant abuse that we subject it to.</p>
<p>I do have an opinion on the appropriate size, but that is subjective Even though they may be teachers
consider are they a young couple or a bit older and further along in their careers, what size do her sisters, sisters-in-laws, colleagues, friends, etc have? A stone in the ¾ to 1 carat range may not be out of reach and is a respectable size. If someone were to purchase or use a stone of ½ carat of less, I would like to see it set in a diamond semi-mount which would enhance the overall substance of the ring. That is my opinion, with the disclaimer that I live in the suburban Northeast where size matters in certain communities. Use Blue Nile for price comps
I found that they were close to wholesale pricing and then work with a jeweler who brokers stones from a supplier. That way you have the ability to negotiate, and choose a stone in your desired size/color/clarity range.</p>