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Article ID : 62
Audience : Default
Version 1.00
Published Date: 2009/12/11 13:50:00
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Sunday “At Peridot Central”
Mount Shadwell, the Olivine Capital” of Australia.

Starting with a convoy of six cars to the Quarry just outside Mortlake, and the mandatory 10.30 start at the quarry face,
not less that 20 members of the Geelong Club & several members of the Warrnambool Club made their way to the
top of the quarry face to collect and“smash” Olivine “bombs” that were already piled.

This year we had inside knowledge and knew that the best specimens were to be found in the light brown rocks. Within
minutes Des, Heather & I found suitable sized specimens for faceting.

The quarry site had considerably changed since our last visit and the organised piles of “bombs” made our expedition farless strenuous, but with biting winds and impending rain meant the afternoon was spent collecting suitable rocks to be
transported home.

Mt Shadwell is the type of place you can
visit and find "plenty" or "nothing" if youare looking for facet quality peridot. I have visited the quarry on several occasions
with my companions finding nice bombs with gem material within. Each "good bomb" can yield several "cutters". So like many fossicking locations, you have to be digging in the "right spot" at the "right time"!

Facts about Peridot

With an estimated Value of $100 per carat
“cut”, most of the club members have
come home with more than they left.

Most peridot range in hardness 6.5 -7 and
not suitable for rings, and the stone loses
its lustre if cleaned in an ultrasonic bath.
Olivine is a "magnesium iron silicate" and

By Gayle K

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