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Gold Quartz stones


#1

I have recently purchased a few Gold Quartz stones for a customer out of
state that wants acustom ring made. This is my first look at these stones
and I am worried by what I would call craze lines, or fractures waiting to
happen. I was concerned if this was a characteristic of the mineral or if
I have puchased stones that are destined to crack. I have to bezel set and
wonder if they are tough enough to handle the process and last during the
customers normal daily activities. I would appreciate any insight into
this as possible, before I send them back due to fear. Thanks


#2

It’s difficult to say without seeing them but most gold in quartz has been
or needs to be treated with Opticon which is a sealant made by Hughes.
Some varieties are more stable than others. Check with the supplier to see
if they have been treated. If not, they are probably more likely to be
problematic.

Bill Navran


#3

Hi A couple of years ago, a customer brought part of a gold-quartz slab to
cut and use for a pendant. It was clear and in a way similar to rutilated
quartz, but naturally the gold did not have the fine structure of rutile.
I wet the piece to see if any cracks would show after examining as
carefully as I could. It worked out quite nicely. By the way, my customer
has a matching ring that worked out fine. I guess, I would work on it if
the quartz was solid, not fracured and if the inclusions were gold. I hope
this helps. Elizabeth


#4

Chuck, The best gold in quartz does not have problems bezel setting. It is
still fragile and you must be careful. Gold veins within quartz causes
weak areas. Look careful at your cabs. Are the lines you see fractures
caused by blasting? If so the cabs will probably be unstable. Even if
they are treated. Good cabs may have small fractures that are caused by
the gold in the quartz and are naturally occurring. Some people stabilize
all their gold cabs. Either way the customer should know that a gold
quartz cab is fragile and must be worn carefully.

Gerry Galarneau


#5

Chuck, I assume you are talking about native gold in white
quartz.(probably from the “sixteen to one” mine in no.Calif.) most of the
material I have seen from there is stabilized and should not present a
problem if it is not subjected to heat. you can contact your supplier and
find out.If you bought it in the rough than you can use Opticon to treat
for stability yourself. If it is not treated then you may have a problem,
as much “gold in matrix” stones tend to be cracky, especially under
stress. later, Mark Ruby


#6

Chuck:

Check with the supplier to see if your stones have been stabilized with
Opticon fracture sealer. Gold in quartz for lapidary purposes is usually
a by-product of commercial gold mining. The quartz is released from the
host rock by blasting, and this often results in a few hairline fractures.
From your description it sounds as if the fractures may be more than
"hairline." Obtain an understanding with your supplier about that, too.
They shouldn’t detract from the appearance of the finished jewelry.

You can do the Opticon treatment yourself but you’ll need some way to
repolish the stones when you’re done. If you’re purchasing finished
stones the procedure should have been done by the supplier. If properly
stabilized, the stones should easily stand up to skilled bezel-setting.

Rick Martin