Amber
belongs to the organic gem’s group,
so gems that are created by living organism (in this case plants) in a biological
process. Is a resin of an extinct pine, which probably produced it in a huge
quantity. This resin settled and hardened with time, holding within it all that
she had incorporated when still soft, was in various crevices of barks or rocks
around.
To be
called “Amber” this resin can’t be younger than a million years!
It has been
used ornamentally up to 13.000 years, mostly in northern Europe ,
and historically has been used (it is still now) also as perfume, medicine and
cosmetics.
Amber is soft and warm to the touch. Because is not a
mineral it doesn’t have a crystalline structure, actually its an amorphic (no shape). It’s very easy to
work, very often the artisans make complex carvings that sometimes are real
master-piece.
Amber's popularity is due to its special inclusions. The gem is not expensive, indeed it
is one of the cheapest, unless if small prehistoric creatures, that are now
extinct, are trapped inside it.
Because
comes as a soft and sticky material, it could happen to some insects or small
animal to remain trapped along with leaves or other plants. Today these
“guests” are real relics that help scientists discover more about our past and
about the environment where they were formed.
Because
every piece is unique, amber that contains this special inclusions hold on the
market a price far higher than those clear and without inclusions.
The world’s
leading source of Amber is in Northern Europe ,
the Baltic Sea Region. The past
geological eras have changed the geography of the land but has retained all
production of the prehistoric conifers that produced this special resin. Every
time that occurs in the sea an erosion some amber is released; its low specific
gravity allows it to float in salt water, so, once on the surface, waves washes
it to beaches where is possible collect them.
Of course,
this is not the only one way to find Amber. In the World there are several
open-pit mines where the gem is mined directly from the ground. The other main
sources of Amber in the world are: Dominican Republic ,
right now the most important, Mexico and also Italy , in Sicily Island ,
where the gem is called Simetite.
Hardness and toughness are very low, so if used
in everyday jewellery needs care but not special maintenance. It is sensitive
to heat, burns at low temperatures giving off a peasant scent; actually
is often used as fragrance for incense.
IMPORTANT: beware of who wants to sell gems and
marketing them for true Amber, and to prove their authenticity passes the flame
of the lighter under the stone to show you that does not burn! It happened to
me to see it, done by peddlers, and many people believe it! If it were really
amber it would burn out quickly, and would also be irreparably damaged!
Sun Spangles within Amber |
Treatments to enhance its beauty are very common, the most common are oil filling that clarifies cloudy gems and heating to lightens dark amber. Heating creates also inclusion called sun spangles.
We can find some different kind of imitators, either
natural and manmade. The most common natural is the Copal, which is a natural resin younger than amber, it has less
then a million years.
in this Ambroid is possible see some bees and olive's leafs. if they were real inclusions in true Aber, this big gem would be priceless! |
As
manmade imitator plastic is the most
used, this material resembles amber in many aspects; the only two things that
make them different are the types of inclusions and their specific gravity: the
plastic has a SG higher than amber, so it sink in salt water.
An object that is commonly found in jewellery
is the Ambroid: small pieces of
Amber are heated and gathered together
with high pressure: this technique makes not only a bigger gem, but also
a gem that gives positive results to all identification tests, but is very easy
to identify with magnification; usually some gas bubbles get trapped between
the stones, which are visible at the loupe!