21.54ct Octagon Amethyst 20x15mm

Amethyst’s lustre is vitreous; it rates 7 on the Mohs scale which makes it suitable for jewellery that has secure settings to protect the stone from wear. Depending on the transparency of the stone which can be anything between transparent to opaque, amethysts are cut into faceted gems, cabochons, beads or shaped into carvings. Very commonly they are left intact as geodes, natural specimens of crystals still attached to their host-rock, that become beautiful decorative ornaments.

• Stone Size: 20 x 15
• Carat Weight (ct): 21.54

Use mild soapy water and a soft cloth to clean your jewellery

We use Royal Mail Special Delivery by 1pm and all items are insured for your peace of mind.
There is no delivery charge if you spend over £500 during an order. If your order is less than £500, a flat rate of £8.80 is applied to your order.
For International deliveries there is no delivery charge if you spend over £750, if your order is less, a flat rate of £15 is applied.
Please read more here.

When buying gemstones we recognise the importance of being able to reassure our customers about the quality of those items. An increasing number of gemstones and diamonds have been artificially enhanced or synthesised in a laboratory. Whilst some processes are legitimate, any enhancement or treatment should be disclosed to the customer at the point of sale.

Holts Lapidary Guarantee

Holts Lapidary have been buying and selling gemstones for over 70 years.

We have a team of qualified gemmologists on-hand to examine and inspect every gemstone. Each team member is either qualified by the Gemmological Association of Great Britain or the Gemmological Institute of America. We have our own in-house, fully equipped gemmological laboratory that our gemmologiists use to undertake all tests required. We do also have associated laboratories to undertake further tests if required. Each piece is examined under magnification and where necessary has undergone more rigurous testing in our in-house laboratory.

This means that every gemstone supplied (loose or in an item of jewellery) has undergone a strict process of inspection and testing. We put our name and reputation on everything we supply, knowing that we have taken meticulous care with the process of testing. Our 70 years reputation is underpinned by you being able to trust Holts Lapidary level of care taken and the duty to their customers.

Where requested by you, we can also supply the following: 

Test Certificate for your

Gemstone

This includes information such as:

The identity of the gemstoneIs it natural or syntheticHas the gemstone been filled/dyedThe technical specification of the gemstone (dimensions, cut, clarity and colour), weight, condition, method of manufacture (if a jewellery item), size, valuation amount (based on current market value to re-make) 

Our Team

Our vast experience guarantees to you that our staff can advise you on almost any gemstone or rough gemstone/mineral material from the most recognised stones through to the more rare/unusual.

Our craftsmen and women take great pride in their work and are highly skilled at what they do. You will only receive your jewellery once it has been fully approved by our team of gemmologists.

We are members of:

the NAJ (National Association of Jewellers)The Guild of Master CraftsmenGEM-A (the Gemmological Association of Great Britain)

We will not try to sell you something just because we stock it. Holts Lapidary is a knowledge resource and we will help you find/source what you want, within your budget.       

Our customer service is second to none. We will always go above and beyond to help you if we can.

Product Imagery

We take every care to depict our jewellery and gemstones as accurately as possible through imagery online, however colour will vary per device and screen resolution. 

Images may also appear smaller or larger than their actual size in order for you to see the entire product or to see the item in better detail.

We optimise our photography for apple devices as standard.