Short answer: Alexander Castle is a family-run jewellery business based in Glasgow, Scotland, selling sterling silver and 9ct gold necklaces, chains, earrings, bracelets and brooches with Celtic, Scottish, religious and Charles Rennie Mackintosh designs. Silver pendant necklaces start from under £25 at the time of writing, solid 9ct gold pieces are available from around £85, every order arrives in a branded gift box with free UK delivery, and purchases are covered by a 90-day returns guarantee. The company displays its Trustpilot rating and customer reviews on its website.

If you have searched for a thistle pendant, a St Christopher for a new driver or a Celtic knot necklace, the name Alexander Castle has probably come up, and the natural next questions are who is behind it, whether the jewellery is real silver and gold, and what happens if a gift is the wrong size. This guide answers those questions with the facts from the company’s own site: what the brand is, what it sells, how delivery and returns work, and how to pick the right piece from a range of several hundred designs.

Who is Alexander Castle?

Alexander Castle is an independent, family-run jeweller registered as Alexander Castle Ltd and operating from Glasgow (PO Box 26397, G76 6BU), with a customer line on 0141 266 0102. The business describes its focus as “timeless pieces that carry heart, heritage and meaning” and its four design pillars as Celtic heritage, Scottish tradition, religious symbolism and the work of the Glasgow designer Charles Rennie Mackintosh.

The scale is that of a specialist online shop rather than a high-street chain: a broad catalogue of several hundred designs, combined with a promise of personal service, fast dispatch from Scotland and next-day delivery on many items. The customer reviews the company shows on its site and on Trustpilot mostly repeat the same two themes: quick, well-packaged delivery and jewellery that matches the photos.

What does Alexander Castle sell? 

Alexander Castle sells finished jewellery in sterling silver and 9ct gold across seven product types - chains, necklaces, earrings, bracelets, brooches, rosary beads and accessories such as cufflinks, kilt pins and key rings - organised into themed collections. The five collections below cover most of what customers come for.

1. Celtic jewellery - knots, crosses, Claddagh and shamrocks 

The Celtic range is the largest and includes a broad selection of necklaces, earrings, bracelets, brooches and accessories. Silver Celtic necklaces include trinity knots, interlaced eternity knots, Celtic hearts, Claddagh designs, shamrocks and more than ten Celtic cross variants, several set with amethyst or green stone, with prices starting from £24.99 at the time of writing. Matching Celtic earrings, bracelets, brooches and sterling silver cufflinks let a buyer build a set. Full range: Celtic necklaces.

2. Scottish jewellery - thistles, Luckenbooths and Highland animals 

The Scottish collection is built around the thistle in a dozen versions (plain, filigree, with amethyst or blue topaz), the Luckenbooth heart-and-crown pendant, and a lighter side: Highland cow, Scottie dog, stag, sheep, Lion Rampant, bagpipes and several Loch Ness Monster pendants. Silver Scottish necklaces start from £19.99 at the time of writing, and the sterling silver thistle with amethyst is listed among the site’s best sellers. Browse the Scottish collection.

3. Religious jewellery - St Christophers, Miraculous Medals, crosses and rosaries 

Religious pieces are where Alexander Castle offers the widest choice of metals and sizes. St Christopher medals alone run to more than 40 products, from a 12 mm children’s silver pendant to a 30 mm reversible medallion, in both sterling silver and solid 9ct gold, on chains from 16 to 20 inches. The range also includes Miraculous Medals, crucifixes, plain and Celtic crosses (a small 9ct gold cross necklace from £84.99 is a top seller) and rosary beads. See the St Christopher collection.

4. Charles Rennie Mackintosh jewellery 

Around 20 sterling silver necklace designs reproduce the Glasgow architect’s Art Nouveau motifs: the stylised rose, flowing geometric lines and openwork frames, some set with amethyst or blue topaz. The collection may appeal particularly to buyers looking for a jewellery gift connected with Glasgow and Scottish design heritage. Browse the Mackintosh collection.

5. 9ct gold chains 

Alongside pendants, Alexander Castle sells hallmarked 9ct yellow gold chains - curb, figaro, belcher, rope, box and anchor trace - in lengths from 18 to 24 inches, from under £100 for the lightest styles to several hundred pounds for heavier solid chains. Lightweight hollow curb chains are offered for buyers who want the look of a heavier chain at a lower price.

Is Alexander Castle jewellery real silver and gold? 

Yes. Most silver pieces are solid 925 sterling silver, pendant and chain alike. Products described as 9ct gold are solid 9ct (375) gold, and the chains are described as hallmarked. Gold-plated designs - sterling silver with a gold layer - are clearly labelled separately in the product name. The rule of thumb on the site is simple: “silver” means sterling silver, “9ct gold” means solid gold, and “gold-plated” means silver with a gold finish.

Product pages list the pendant dimensions and, for most items, the weight - for example a 16 mm interlaced Celtic knot at about 1.5 g or a 27 mm 9ct gold St Christopher at 8.5 g - which is the fastest way to judge how substantial a piece will feel before it arrives.

Table 1. Alexander Castle collections at a glance 

Every item in the table ships with an Alexander Castle gift box and free UK delivery. Current prices are shown on each collection page.

Checklist: how to choose a gift from Alexander Castle 

1. Start from the occasion, not the metal: St Christopher for a new driver or traveller, Celtic knot or heart for an anniversary, thistle or Mackintosh for someone who misses Scotland, cross or Miraculous Medal for a christening or confirmation.

2. Set the budget band. Silver pendants on an 18-inch chain start from around £20-£25; larger or gemstone silver pieces sit higher; solid 9ct gold starts from around £85.

3. Read the pendant size in millimetres on the product page. As a general guide, smaller pendants look more delicate, while pieces around 22 mm and above have a more noticeable presence.

4. Check chain length. The standard is 18 inches, which sits at the collarbone; some St Christophers and gold chains are available at 16, 20 or 24 inches.

5. Choose the metal by how it will be worn: sterling silver polishes back for decades and suits daily wear; gold-plated silver gives a gold look at a lower price but the plating can wear over time; solid 9ct gold does not wear through and suits a keepsake.

6. For a set, pair a necklace with matching earrings or cufflinks from the same collection - Celtic and Mackintosh designs are sold across several product types.

7. Allow time around Christmas and Mother’s Day: the site shows the current dispatch date on every product page, and next-day delivery depends on it.

Delivery, returns and looking after the jewellery 

UK delivery is free on every order, with fast dispatch from Scotland and next-day delivery available on many items; the exact dispatch date for the current week is displayed on each product page. Returns are accepted within 90 days of receiving the item as long as it is unworn, undamaged and in its original packaging, with two exceptions worth knowing: earrings cannot be returned once worn, for hygiene reasons, and any fault must be reported within 24 hours of receipt. Original shipping charges are not refunded, and you should contact the team before sending anything back so they can confirm the refund or replacement route.

Caring for the jewellery is straightforward. Store it in the gift box or a sealed pouch in a dry, dark place, wipe it with a soft lint-free cloth after wearing, and keep it away from perfume, hairspray, chlorine and salt water. For a deeper clean, warm water with a drop of mild dish soap and a soft toothbrush, then rinse and air dry. Gold-plated pieces should never be rubbed with a silver polishing cloth.

What to expect when ordering from Alexander Castle 

Ordering from Alexander Castle means buying Celtic and Scottish jewellery from a Scottish company, with the metal stated plainly in the product name, the dimensions and weight listed on the page, a branded gift box in the parcel and a 90-day window to return or exchange an unworn item. The range starts at solid sterling silver rather than plated alloy, so the entry prices reflect the metal.

For a first order, the best sellers page shows the pieces customers order most - at the time of writing it includes a small 9ct gold cross, a silver St Christopher, a silver thistle with amethyst and a 9ct gold curb chain, which is a fair snapshot of the four collections in one place.

FAQ 

Where is Alexander Castle based? 

Alexander Castle is based in Glasgow, Scotland, and trades as Alexander Castle Ltd from PO Box 26397, Glasgow, G76 6BU. Orders are dispatched from Scotland, and the customer line is 0141 266 0102. The company is an online jeweller rather than a walk-in shop, so browsing and ordering happen on alexandercastle.com.

Is Alexander Castle a legitimate company? 

Yes. Alexander Castle Ltd is a family-run UK company with a published returns policy including a 90-day guarantee, a UK phone number, a postal returns address and a Trustpilot profile linked from its website. Reviews consistently mention quick delivery and secure packaging, which is the practical test of a legitimate jeweller.

Does Alexander Castle sell 9ct gold or only silver? 

Both. Most pendant designs are sterling silver, but the religious range (St Christophers, crosses, Miraculous Medals) and the chains collection are available in solid 9ct gold, from £84.99 for a small gold cross necklace at the time of writing. A handful of Celtic designs are offered in gold-plated sterling silver as a middle option, and these are labelled as gold-plated in the product name.

Does the jewellery come in a gift box? 

Yes - every item, at every price, arrives in an Alexander Castle branded jewellery gift box, so a silver pendant is as ready to hand over as a gold medal. The box also doubles as the best place to store silver, because keeping air off the metal slows tarnishing.

What is the delivery and returns policy at Alexander Castle? 

UK delivery is free on all orders with next-day delivery available on many items, and returns are accepted for 90 days from receipt provided the item is unworn and in its original packaging. Worn earrings cannot be returned, faults must be reported within 24 hours, and original postage is not refunded. Contact the team before returning so they can confirm the process.

Summary 

Alexander Castle is a Glasgow-based family jeweller that does one thing well: meaningful Celtic, Scottish, religious and Mackintosh jewellery in clearly stated sterling silver and 9ct gold, boxed and delivered free in the UK with a 90-day returns guarantee. If you know the occasion and the budget band, the checklist above will get you to the right piece in a few minutes. Browse the collections on alexandercastle.com or call 0141 266 0102 if you would like help choosing.