Diamonds are forever: Value of claims increases by a third - Aviva Research

New research by insurer Aviva reveals that the average claim for a missing diamond has increased by 33% - from £7,618 in 2024 to £10,157 in 2025^[1].

The warning to protect jewellery comes as Aviva high net worth claims data reveals a 13% increase in claims for missing diamonds.

The rise in claims could be explained by the enduring appeal of diamonds. Separate research from Aviva, shows that diamonds continue to be the most popular choice for engagement rings, with nearly two thirds (63%) selecting this precious stone^[2]. Sapphires feature in just over one in ten engagement rings (11%), while emeralds appear in 7%. 

Only a small number of couples - 3% - opt for lab-grown diamonds. 

The research also shows that many couples have chosen rings featuring multiple stones, with the typical engagement ring containing three.

The top five most common stones for engagement rings include^[2]:

1. Diamond (63%)

2. Sapphire (11%)

3. Emerald (7%)

4. Ruby (6%)

5. Pearl (4%)

The research also reveals that many people still favour the classics, with gold bands remaining especially popular (48%). In fact, almost one in three (30%) opt for an 18ct gold ring, followed by 9ct gold (18%) and silver/ platinum (both at 12%).

Ann Owen, Managing Director at Aviva Private Clients, comments: “Diamonds really are forever and it’s interesting to see how the average value of a claim has increased drastically in recent years.

“Engagement jewellery – whether a ring, bracelet or other treasured piece – carries huge sentimental value, which is why having the right level of cover is so important. In many cases, high-value items can be protected under the valuables section of home insurance, which typically covers loss, theft and damage. However, depending on the value, you may need to list it separately on your policy to make sure it’s fully covered - often for a small additional cost.”

The research shows that while most people (76%) purchase a brand-new ring, 6% choose another type of engagement jewellery instead - ranging from bracelets and necklaces to watches and earrings. A further 7% opt for a family heirloom and yet despite this, almost one in five (18%) do not know how much their engagement ring is worth. More than two thirds (68%) have also never had it revalued.

Ann Owen adds: “If you own a high-end piece of jewellery, keeping the valuation up to date is essential - especially for items that have been passed down through your family. The value of gold and diamonds, for example, have fluctuated significantly in recent years, and an up-to-date valuation helps ensure you have the right level of insurance should the worst unfortunately happen. 

“If you have numerous expensive pieces, it could also be worth looking at a specialist high net worth policy to make sure you have the right level of cover in place for your collection.”

Aviva’s top tips for helping to protect high-value jewellery include:

• Take it off for everyday activities – Remove jewellery when swimming, cleaning, gardening, exercising, or even applying lotions. Chemicals, knocks and slippery hands are common causes of damage and loss, with Aviva claims data showing multiple lost diamonds from activities such as gardening. 
• Clean carefully - Use mild soap and warm water or a soft polishing cloth. Avoid harsh chemicals or ultrasonic cleaners - unless a jeweller recommends it – as this can loosen stones.
• Think about where and when you wear your jewellery - Avoid flashing expensive pieces in busy areas or when travelling. This helps reduce any unwanted attention and the risk of theft or opportunistic grab‑and‑run situations. 
• Avoid over-sharing on social media – While it’s tempting to share news on social media, especially if you’ve got engaged, avoid close-ups of your jewellery, and details of where you live. Thieves can target people who’ve shared photos of their belongings so it’s best to be cautious.
• Keep it secure - Think carefully about where you store jewellery in your home. It’s advisable to keep items of value in a high-quality safe – and separately too - to prevent scratching. Distributing items across multiple safes could also be a good option for those with multiple high-end pieces. 
• Avoid extreme temperatures - Sudden temperature changes can crack gemstones. Try not to leave jewellery in cars or conservatories, for example.
• Get regular valuations - Jewellery values change over time. Updating your valuation every 2–3 years helps make sure it’s insured for the right amount and fully covered if you ever need to claim. Keep hold of this – and any photos – for your records. If you’re unsure of how to find a trusted valuer, you could contact your insurer who may be able to advise. Valuations should also include as much detail as possible such as weight, size, colour and clarity. 
• Consider specialist coverage – Depending on the value of your collection, it could be worth taking out a specialist high net worth policy, which will likely have higher limits than your standard home insurance policy. 

Aviva Private Clients is a bespoke offering designed to protect wealthy individuals and their assets worldwide. Types of assets include high value homes, valuables such as jewellery and fine art and high value vehicles.