go safely.

Bronze figures with a thick red patina, which scales off readily
sometimes, or with thick green patina cracked, or hard green or brown
patina, are safe. Thin green patina, or bare brown or black metal is
dubious.

Papyri in roll, flexible though fragile, in known Greek or Egyptian
writing, are fairly safe. Lumps stuck together, brown and scrappy,
are made up.

Coins cannot be safely bought unless patinated, copper or silver.
Only an expert can judge of gold or 'clean silver.

Jewellery of small size, as earrings and bracelets, is generally
safe, if the age of the design is known. Modern wire is always drawn,
ancient is irregular. Look for concretions of lime in the hollows,
and for the dull face of old gold. If once cleaned there is little to
distinguish old from modern gold.

Stone vases if turned are Roman or modern. The ancient irregularities
should be studied from specimens.

Scarabs with nacreous or decomposed glaze in the hollows (as in the
deep cuts at the side) are safe; also, if there are natural cracks by
age, which would prevent modern cutting. There is a large variety of
skilful forgeries.

Stone statuettes: a skilled forger may be paid up to 100 pounds for a
figure to order. Only an expert can judge.