There are slogans that say "A Diamond is Forever". Does it mean
that diamonds are indestructible?
Diamonds are very hard, the hardest of all substances.
This means they can scratch other substances and can resist
scratching. They are tough and can stand up to a lot of daily
wear. But nothing has perfect toughness, and even diamonds can
be broken. Hence, they are not indestructible.
2) Why is cut so important when selecting a diamond?
Cut refers to the proportions of a diamond. Only when the angles
are correct will the diamond reflect light to its best ability,
ensuring maximum brilliance, fire and sparkle. A good cutter
has to understand the principle path of light and how to control
it through angles and proportions to bring about the best qualities
in each diamond, maximising light return and achieving balance
between brilliance and fire.
3) HPHT Diamonds, CVD Diamonds and Synthetic Moissanite.
What are they?
They are new names in the diamond market. HPHT (High Pressure/High
Temperature) Diamonds and CVC (Chemical Vapour Deposition) Diamonds
are laboratory-created. Synthetic Moissanite is the latest laboratory
created diamond simulant that will fool a thermal diamond tester
by giving a false positive reading.
4) What is the difference between platinum, 18K white gold
and 18K yellow gold?
Platinum is a soft, heavy, light grey precious metal that costs
more than gold. It occurs in association with other rare metals
known collectively as the platinum group of metals. They include
platinum, ruthenium, osmium, iridium, palladium and rhodium.
Jewellery platinum is 90-95% platinum with iridium or ruthenium
as hardener. It does not tarnish or yellow and maintains its
white appearance with little maintenance.
18k white gold is 75% pure gold and 25% alloy (usually nickel,
zine, copper, tin, platinum or manganese). White gold is rhodium
plated to give it the same white look as platinum but the rhodium
would wear off eventually and the white gold takes on yellow
18K Yellow Gold it 75% pure gold and 25% alloy (Silver and Copper).
The more copper, the darker the yellow. t:
5) What is used to change the colour of gold?
Besides hardening metal, the addition of alloying metals is
used to change the colour of gold.
Typical alloying metals and their colouring effect:
Copper: Reddening. It is the rich red copper combine
with the pure yellow gold that gives a rosy tone
What is the difference between natural gemstones, lab-created
gemstones, and heat-treated gemstones?
gemstones, as the name imply, are found in nature.
Laboratory created gemstones and synthetics are created in a
laboratory. They do not have the rarity of naturally coloured
stones and are generally less expensive. Unlike imitations that
look like natural stones in appearance only (examples glass,
plastic or less costly substances), synthetic gemstones have
the same chemical, physical and optical properties as natural
A large proportion of gemstones have been treated in one way
or another, with untreated gemstones being the exception rather
than the rule. Sapphires and Rubies are routinely heated to
improve their colour or clarity. There are various types of
heat treatment. The basic treatment where the Sapphires and
Rubies are just heated is recognised by the gemstone industry.
Treated gemstones is widely available in the market. However,
a premium is usually charged for a fine quality untreated gemstone
that comes with a lab report that stated that there is no evidence
of heat treatment.
Failure to fully disclose treatment processes can cause unnecessary
confusion to gemstones buyers. At Richard Hung Jewellers, there
is nothing more important than your confidence in a purchase,
satisfaction, and long-term peace of mind. Please
refer to our Store Policy on Gems Treatment Disclosure.
What are A-Jade, B-Jade and c-Jade
A-Jade: Untreated natural jadeite jade. No detection
of polymer filling but slight wax coating is acceptable due
to final polishing process when jadeite soaked in hot wax. Colour
B-Jade: Natural jadeite jade that has been bleached and
filled with colourless polymer. The treatment involves strong
acid to bleach out all dark mineral substances mainly iron oxide.
Polymer is then introduced to fill in the void left after the
C-Jade: Dyed jadeite jade. As green being the most desirable
colour, green dye are commonly used. The dye that colour the
jade artificially will not be able to withstand the wear and
tear for long period. Hence, dye induced colour of C-Jade is
8) What is the difference between Natural pearls, Cultured pearls
and Imitation pearls?
Natural pearls are formed by oysters and other mollusks.
Cultured pearls are made by oysters or mollusk but with human
aid. A nucleus (in a form of mother-of-pearl bead) that acts
as an irritant is introduced into the shell to cause the pearl
Imitation pearls are man-made with glass, plastic or other organic
9) How do I care for my jewellery and pearls?
Jewellery, like anything that are worn get dirty. They are soon
covered with oil or cream from your hands and start to pick
up dust and dirt. The effect on the overall appearance can be
drastic. You can help your jewellery look their best by cleaning
them regularly with a soft toothbrush in mild detergent or soap
water. Commercial jewellery cleaning solution is also recommended.
Pearls whether cultured or natural are organic substances consist
mainly of calcium carbonate and must be treated with utmost
care. They are most sensitive to acids, perspiration, cosmetic
and hair spray. If treated thoughtfully, like wiping them with
a soft cloth after use and keeping them away from other jewels,
you can be assured that your pearls will maintain its beauty