composite stones are manufactured by gluing or fusing two or three stones.
identify these stones the stone is illuminated with a strong thin light from the
pavillon. To examine the stone in a
liquid gives a better result.
we examine the stone carrefully we will see;
difference in colour or luster in between the crown and the pavillon
separation plane around the girdle
air bubbles around the girdle plane
at the table
stones are made out of garnet and glass;
the stone table down on a white paper, examine with a strong light from
different angles. A red ring will be noticed on the white paper.
Note: This red ring will not be visible if the stone is red, orange or
purple or the garnet crown is too thin.
It is made two coloured material or a colourless
crown and coloured pavillon by fusing or gluing with a colourless glue.
These composite stones are made from a colourless natural stone on the crown and
a coloured synthetic stone or glass on the pavillon.
sapphire doublet has a colourless sapphire as crown and fused to a synthetic
Either two colourless material are glued together with a coloured glue or three
piece are glued together with a colourless glue.
emerald triplet below is made from two colourless beryl glued with a green glue.