Frequently Asked Questions

Successfully selecting and purchasing jewellery entails having some understanding of the qualities and characteristics of the precious gems, stones or metals used in jewellery designs.

Products such as wedding and engagement rings are important pieces of jewellery that you will wear over your lifetime, symbolising the promise you and your partner make to each other for life. Other pieces such as opal jewellery and precious gems may serve as investments and need special care to retain their value.

Allgem can help you select the best Australian opals, pearls or other jewellery and advise on long-term care for your investment. Here are a few frequently asked questions from our customers.

What do Allgem Jewellers Sell?

We sell the best collection of quality gold jewellery in Perth, Australian opals and opal jewellery, Australian, South Sea and Tahitian Pearls, precious gems, diamond engagement and wedding rings as well as men’s and women’s gold rings, and more. Please see our online catalogue for more detail. We also offer a range of services including jewellery repairs and restoration of precious gems and settings, valuations, and custom design and manufacture. Visit our services page to find out more or contact us with your enquiry.

Do you Buy Second-hand Jewellery or Loose Gems?

We do not buy second-hand jewellery as we do not possess a second-hand licence.
We do not purchase loose cut/faceted stones from the public.
We do not buy gold or silver scraps from the public.
We can purchase gold nuggets and rough opal from respected miners.

Where is Allgem Jewellers Located?

Allgem is located at 653 Hay Street Mall in Perth, Western Australia. We’re at the Hay Street end of the iconic London Court building and near the famous city clock, a tourist attraction.

How do I Contact Allgem?

You are welcome to visit our store and speak to our friendly sales team or contact us via:

Can I Purchase Online?

We welcome online sales and invite you to browse our product catalogue. We are specialists in Australian opals and opal jewellery as well as precious gems. You will also find links to purchase diamond engagement and wedding rings and a wide range of jewellery.

How Are Payments Processed?

All prices are listed in Australian Dollars (AUD). Payments are debited to your credit card when you place your order. We accept Visa, Master Card, China Union Pay and Amex.

Allgem Jewellers incorporates several security measures to ensure that your personal details are secure. You can pay via credit card using our secure order form and all orders are encrypted for your security and privacy.

Orders will not be delivered until payment has been processed.

What Are The Delivery Details?

We will deliver to all areas within Australia using Australia Post, for any outside orders from all other countries please email us before placing your order as we have purchase requirements for all orders outside of Australia.

Your IP address is recorded and you will be required to provide photo identification to accept delivery and sign for proof of delivery of all items.

We have a set $15 postage rate throughout Australia.

For all items posted within Australia please allow up to 5 work days for delivery. For international orders, please allow 1 - 2 weeks for delivery, depending on location.

How do I Care For My Jewellery?

Jewellery is meant to be worn and appreciated by the owner. If you are concerned about the wear-and-tear of your jewellery, then bring it to us and we will advise you of the correct manner in which items such as precious gems, Australian pearl and opal jewellery or diamond engagement and wedding rings should be worn.

We do not recommend that you leave your diamond engagement ring or best jewellery on during manual labour just as you generally do not wear your best clothing. Jewellery is made of precious metals such as gold, platinum and silver that are malleable into chosen designs and have precious gems set into them easily.

Gold and platinum are called noble metals as they are extremely resistant to attack from chemicals and are unlikely to tarnish. Lower gold alloys such as 9ct gold and sterling silver have higher concentrations of copper and other reactive metals and can discolour over time or in contact with certain chemicals. The oxidation of the surface can easily be removed by treatment with a tarnish removing solution and may also require buffing with a cloth or more professional polishing.

The type of precious gems that are set in the jewellery item and the manner of setting can also determine the fashion of restoration. Jewellery cleaners can have acidic, alkaline or alcohol based ingredients. Most precious gems and gemstones will not be affected by the cleaners but if unsure, please bring it to us for advice.

How do I Store My Jewellery to Prevent Damage?

Store your jewellery and precious gems in a way that prevents different pieces from scratching one another.

Just as gold alloys are of different hardness, precious gems vary significantly and even the points of precious gems can scratch others due to abrasive hardness. The ideal solution is to keep it in a box with separate compartments.

How do I Get Her the Correct Ring Size?

If you are selecting a diamond engagement or wedding ring, there are several ways to find the correct size:

  • Make an impression of a current ring in a bar of soap ensuring the intended diamond engagement or wedding ring is for the same finger;
  • Trace the inside of the ring onto a piece of paper to obtain the internal diameter;
  • Place the ring on your finger as far as it will go and then mark it with a pen;
  • Have a friend of hers ask her finger size as a matter of curiosity.

However, the safest way is to bring us one of her rings with the explanation that you are having it cleaned and checked. We can size a diamond engagement or wedding ring from this.

What is your Returns, Exchanges, and Warranty Policy?

Refunds: We usually do not refund our jewellery, but can offer an exchange or store credit.

Exchanges: We can offer an exchange within 7 days after the purchase. We cannot exchange the item if it has been altered or damaged in any way. If the item chosen for exchange is cheaper than the original item, a store credit is issued. A store credit is only valid for 6 months.

Warranty: We have a 6-month warranty that only covers manufacturing errors. Harm, or wear/tear caused by the customer is not covered by warranty. Our experienced jeweller will examine the item thoroughly to determine the cause of damage.

Buy-backs: We legally cannot buy back any jewellery items we’ve sold as we do not have a second-hand license.

Product aftercare: We advise the all jewellery shouldn’t be worn in rough activities or cleaning. Opal triplets and doublets must not be submerged in hot soapy water. Do not spray perfume or use moisturises around jewellery as this discolours metals and/or damages the stone (especially pearls!).


How much does Allgem charge for jewellery evaluations?

Allgem does not charge evaluations by a percentage of article. As an example a 1-carat genuine diamond solitaire ring will be charged at a starting fee of $300 to value without original documents. Simple coloured stone with all tests from $100. Multi set jewellery pieces are more time consuming, therefore more expensive to value. For exact quotes, the registered valuer would have to have a look at the items in person. Some items might be very old, worn and embedded with dirt. It this case the jewellery has to be cleaned in order for the jeweller to even determine the type of gemstone he is looking at.

Identification Fee (No Valuation) starting from $55 for colourless stone, $85 for single coloured stone

Booking valuers time to go through many articles (inhertied jewellery) to determine if they are genuine, fakes or worth valuing. Starting fee of $50. Valuation charged separately.

Allgem Jewellers strictly do not give “off-the-cuff” estimations on jewellery articles.

All our evaluations are done on premises in our secure workshop by Alfie Gryg (Valuers Number WA075). Please allow 2 to 3 weeks (depending on how many items are left). We provide a photo valuation with retail replacement value.

All valuations require an appointment.

The cost of a valuation depends on the time required to:
1. Itemise the components of a jewellery piece

2. Measure all the parameters including:

(a) Total weight of metal(s) used in the jewellery piece
(b) Precious metal determination by acid sampling and electronic calculation
(b) Manufacturing method(s) used to create the Jewellery piece
(c) Determination of the time required to manufacture the Jewellery piece
(d) Weight of stone(s) by length, width, height, girdle thickness and specific gravity
(e) Establishing the type of stone(s)
(f) Identifying the origin of stone(s) – Natural or Synthetic
(g) The Grade of stone(s) – Colour, Toning, Clarity, Proportions, Polish
(h) Determination of the treatments of stone(s) if any

3. The number of gemmological laboratory tests on each stone needed to ascertain the above items which include:

(i) Hand Lens Observations at 10X magnification
(ii) Microscopic examination – lightfield, darkfield, polarised and fibre optic illumination
(iii) Polariscope Examination
(iv) Dichroscope Examination
(v) Chelsea, Ruby and Jadeite Filter Examination
(vi) Spectroscope Examination
(vii) Refractometer Index manual measurement
(viii) Gem Spectrometer Index measurement
(ix) Specific Gravity measurement where possible
(x) Fluorescence assessment with SW and LW Ultraviolet light
(xi) Diamond Conductivity Probe

Excerpt from NCJV Website:
NCJV Registered Valuers™ use the latest testing equipment and procedures to provide a scientific analysis of precious and semi-precious gems. They are trained to identify the tiniest details that can affect a valuation and are familiar with the techniques used in the manufacture of imported and modern jewellery, and the creation of antique pieces.
Importantly, their ongoing training means they are kept up-to-date with market trends which can affect price.

To identify an NCJV Registered Valuer™ ask for a copy of their seal and Registered Valuer Number. Alternatively contact their relevant State Division to ascertain their current membership status.