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The Gemmological Association of Great Britain

London, England · United Kingdom Charity No 1109555 (Charity Commission) Education
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76 / 100
Integrity score
Strong transparency

About

Providing gemmological education and information, and providing Gemmological Association membership services.

Focus & reach

Category
Causes

Verification & registration

Every mark links to the official registry entry and opens in a new tab.

Integrity assessment

A score from 0 to 100 for how openly a charity shares public information across five areas: registration, financial disclosure, governance, contact details, and data recency. It does not measure programme impact. See exactly what we do and do not have →

Registration 16/20
Government registration ID on record +8
Sourced from official registry +4
Cross-referenced (2+ sources) +4
Profile not yet claimed by organization 0
Financial Transparency 24/30
No financial documents found on website 0
Financial filing on record +8
Revenue figure disclosed +6
Spending figure disclosed +6
Detailed financial breakdown disclosed +4
Governance 16/20
At least 1 officer disclosed +5
3+ officers disclosed +3
Officer titles disclosed +2
Executive compensation not disclosed 0
Mission / description on file +3
Founding date on file +3
Contact Availability 10/10
Website +3
Email +3
Phone +2
Physical address +2
Data Recency 10/20
Updated within 2 years +10
Newer data needed for full score 0
Red flags 0
No red flags detected, so nothing is deducted 0

Financials

Charity Commission (UK)
Annual revenue
£3.3 million
Reporting year
2024
To programmes
81%
See 5 years of financials
Revenue history, expense breakdowns, and balance sheet, free with an account.
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Leadership at a glance

Official filings
AL
Alistair M••••••••
Trustee
JO
Joanna H••••••••
Trustee
KA
Katie M••••••••
Trustee
MA
Marguerite A••••••••
Trustee

Similar charities

GiveRadarGiveRadar Intelligence

GiveRadar Analysis

From what GiveRadar has verified so far, The Gemmological Association of Great Britain has a substantially complete profile, cross-referenced across 3 independent sources including the Charity Commission.

  • By reported annual revenue, it is larger than 92% of the 78,357 education charities in the United Kingdom with financial records on GiveRadar. See the filings
  • GiveRadar holds 5 years of financial filings for this organization, the most recent for fiscal year 2024. See the filings
  • Its integrity score of 76 places it in the top 25% of the 87,708 education charities in the United Kingdom GiveRadar tracks, because GiveRadar has verified its financial disclosures and its registration. View this cohort
GiveRadar has verified
  • government registration
  • financial records (5 filed years)
  • disclosed leadership
  • a website
  • a contact email

Analysis based on GiveRadar's benchmark dataset of 2026-07-03. It describes what GiveRadar has verified, not a judgment of the organization itself.

Annual revenue
£3.3 million
81% to programs. Figures from Charity Commission (UK).
See 5 years of financials

Filing history

5 years on file from Charity Commission (UK): revenue, expenses, program spending, assets, and liabilities by fiscal year.

Years on record: 2024, 2023, 2022, 2021, 2020.
Financial details are free with a GiveRadar account

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Tax deductibility

Whether a gift to The Gemmological Association of Great Britain lowers your own taxes depends on where you pay them. Choose your country to see the rule that applies.

Tax-deductible

UK donations qualify for Gift Aid. The Gemmological Association of Great Britain is registered with the Charity Commission. Eligible UK taxpayers can boost their gift by 25% at no extra cost.

This is general guidance, not tax advice. Confirm treatment with the charity or your tax advisor before donating.

Leadership & board

Official filings

Board members and senior officers on record, with disclosed pay where available.

See full names, roles, and stories

7 officers and trustees on file, free with a GiveRadar account.

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Officer names and roles come straight from official filings. We mirror the official record exactly and never edit it.

No red flags detected

Screened for the risks donors care about.
Charity Commission removal None found
Open investigations None found
Governance scandals None found
Related-party deals None found
Excessive exec comp None found

Timeline

From official filings

Key dates from this charity's official filings, newest first.

FY2024
Form filed
£3.2M revenue, Charity Commission (UK)
FY2023
Form filed
£3.2M revenue, Charity Commission (UK)
FY2022
Form filed
£3.0M revenue, Charity Commission (UK)
FY2021
Form filed
£2.8M revenue, Charity Commission (UK)
FY2020
Form filed
£2.8M revenue, Charity Commission (UK)

In the news

From public news

No recent news coverage found

News coverage will appear here when articles mention this organization.

Reviews
4.8 average from 21 reviews
4.8
21 reviews
5
18
4
1
3
2
2
0
1
0
RA
Rahul Desai
Mar 26, 2026 · Donor Trustpilot Trustpilot
Best and well designed program!

Best and well designed program!

PA
Patrice
Mar 26, 2026 · Donor Trustpilot Trustpilot
Excellent work, well structured and understand

Excellent work

MI
miguel zenetos
Mar 26, 2026 · Donor Trustpilot Trustpilot
Gemintro has excellent topics and well…

Gemintro has excellent topics and well explained with good pictures provide clearly understanding and the verbiage excellent for the beginners it worth to attend this course a new way to learn about gemstones and their sources .Prof Miguel Zenetos GG GIA ,Academy Gubelin.Contact+55(19) 98326.7000

AL
Alizee
Mar 26, 2026 · Donor Trustpilot Trustpilot
It was very enlightening

It was very enlightening, this course is an introduction to gemmology while being very comprehensive and rich of informations. The various speakers were very clear and you could feel their passion and experience through their explanations. It motivated me and made me want to continue studying at Gem-A but via distancing learning because I live in the French Riviera. I highly recommend it !

TS
Tsiropoulos Aris
Mar 26, 2026 · Donor Trustpilot Trustpilot
It was a simple and easy to understand method

It was a simple, Interesting to understand step by step procedure through the course outline that made me want to know more..It was a very beneficial course for me and i would love to continue to the next level.

GI
Gita Jensen-Rude
Mar 26, 2026 · Donor Trustpilot Trustpilot
My experience with Gem-A was as…

My experience with Gem-A was as expected challenging, even more than I had anticipated, but it was so educational and fun. Really a great introductory to the world of Gems. I feel I received a world of knowledge that I can make use of at this level. I am considering moving forward to the next step, just wish I lived in London! If you have the slightest interest, or are just curious in discovering this magical and mysterious world called Gemstones - take this course!

AB
Abdelmajid Jarni
Mar 26, 2026 · Donor Trustpilot Trustpilot
Acknowledgments

Before enrolling in the Gen-A online course, I believed that the online training on gemmology would be less conclusive, especially since the study of minerals requires actual presence in the laboratory or at school. However, by taking the entire course, it led me to completely change my mindset.The training is very well designed, very well thought out and very informative. During the training, I felt certain fluidity in the progress of the latter. Indeed, the chapters follow one another in a logical sequence. The Quiz is very easy. Its objective is to allow the student to follow without difficulty from one chapter to another. This leaves me completely recommending this course to people who want to know more about the world of gems. I thank the entire Gem-A team who prepared this great training.Thank you so much

TO
Tom Simoncelli
Mar 26, 2026 · Donor Trustpilot Trustpilot
GemIntro; Fun and Informative

This course was very informative and fun! Not only was the material very interesting, but it was presented in a manner that was easy to digest. Lessons were long enough to provide a fundamental understanding of the topic, while at the same time, remaining relatively short, so that they may be fit into a daily routine without causing any stress. I found myself treating this course almost like a popular T.V. series, where I'd finish one section and tell myself "okay just one more section". The best part was that, "just one more section" didn't take too long and I found myself enjoying this course as a natural free time activity.

LA
Lauren
Mar 26, 2026 · Donor Trustpilot Trustpilot
Brilliant introductory course

I took this course to see what it would be like to study gemmology as I was advised against it many years ago when I started working in the trade (I was told it was a very boring field of study). This is a great course! I found it fascinating and learnt so much. I thought I already had a pretty good knowledge of gems but even this introductory course has taught me a lot. I also love that the level 2 award certificate can be printed out straight after finishing the course. I would highly recommend this!

MM
Mme KOSTOVA Iva
Mar 26, 2026 · Donor Trustpilot Trustpilot
An exciting journey into gemology

The GemINTRO course is one of the most interesting, inspiring and with very well concentrated information course. The way it's structured is very good and the variety of basic gemological information is perfectly presented in different ways that keep you interested all of the time. I was excited with every new topic and it inspired me to search for all kinds of information for every seed the course gave me. Thank you for the experience! I'm truly hoping that I will have the chance soon to continue with the Gemological foundation.

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How it stacks up against peers

Compared with 8 similar education charities in United Kingdom.

Program spending Behind peer average
This charity
81% Peer average
97%
Integrity Assessment Behind peer average
This charity
76 Peer average
86

Cause areas in United Kingdom

Charities working in each area, this charity's highlighted.

Education
72,716
Health
26,318
Religion
24,342
Arts & Culture
24,283
Community Development
16,310
Social Services
8,665
Environment
6,258
Youth Development
4,668
See all cause areas

Sources and verification

Registration and legal identity
Charity Commission for England and Wales - Register of Charities
Financial filings
Charity Commission annual returns · Fiscal year 2024 most recent on file.
Officers and trustees
Charity Commission for England and Wales - Register of Charities · 7 disclosed in the public registry.
Donor reviews (external)
Trustpilot consumer reviews
Community reviews (verified email)
GiveRadar Community Reviews · 21 verified review(s) on file.

What we know and don't know

Every data point we track for this charity, and whether we have found it. Disclosure only, never a judgment of the charity's work.

Financial data
Named leadership
Government registration
Official website
Headquarters address
Direct contact
Tax-deductibility
Founding date
Executive pay
Mission statement
Programs & activities

Data freshness

How current this profile is, and when we last checked it against the official source.

Last updated
September 1, 2026
Profile edits and newly added data
Registry checked
September 1, 2026
Reconciled with the official source
Latest financials
Financial year 2024
Most recent filing on record
Profile completeness
75%
Data points we track that are filled in

Methodology

GiveRadar builds each profile primarily from official government charity registries, supplemented where available by third-party nonprofit databases and news archives, and combines it into a single 0-100 integrity assessment. The exact sources for this charity are listed above. We don't take a cut of any donation, ever.

Read full methodology
Are you the owner or a board member?

If you represent this organization and want to correct or update its data, you can claim this listing to edit details yourself, or email info@giveradar.com with the correct information. We review every request and respond within 30 days.

FAQ

Frequently asked questions about The Gemmological Association of Great Britain

The Gemmological Association of Great Britain is a registered education nonprofit based in London, England, United Kingdom. It is registered with the Charity Commission for England and Wales. It was founded in 2005 and has been operating for 21 years. GiveRadar's Integrity Assessment for the organization is 76/100, which reflects how much public information is available, not whether the charity is legitimate. The organization reports £3M in annual revenue. 7 officers and directors are publicly disclosed. No red flags have been detected. The charity has 21 community reviews with an average rating of 4.8/5. On Trustpilot, it has a rating of 4.4/5 based on 21 reviews.

Based on official filings, The Gemmological Association of Great Britain has £3M in annual revenue. It allocates 81% of expenses to programs and services. This is below the average of 97% for education charities in United Kingdom. Its revenue is significantly above the peer average of £910K. Create a free GiveRadar account to view the complete financial breakdown with year-over-year trends.

Providing gemmological education and information, and providing Gemmological Association membership services. The Gemmological Association of Great Britain is classified as an education organization registered in United Kingdom. The organization was founded in 2005.

The Gemmological Association of Great Britain is a charitable company limited by guarantee, the most common incorporated form for UK charities. It is registered with both Companies House and the Charity Commission, and must file annual accounts with both regulators. Directors (who are also charity trustees) have limited liability.

The Gemmological Association of Great Britain's registered charity number is 1109555. You can use it to look up the organization on the Charity Commission register.

The Gemmological Association of Great Britain is located in London, England, United Kingdom. The organization was established in 2005 and has been active for 21 years.

The Gemmological Association of Great Britain is based in London in England. The Charity Commission for England and Wales (CCEW) is the primary regulator. Scotland has its own regulator (OSCR), and Northern Ireland has the Charity Commission for Northern Ireland (CCNI). A charity registered with the CCEW may operate across the whole of the UK or internationally.

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Quick facts about The Gemmological Association of Great Britain

What is The Gemmological Association of Great Britain?
The Gemmological Association of Great Britain is a education charitable company based in London, United Kingdom. Providing gemmological education and information, and providing Gemmological Association membership services.
When was The Gemmological Association of Great Britain founded?
The Gemmological Association of Great Britain was founded in 2005.
Where is The Gemmological Association of Great Britain located?
Headquartered in London, England, United Kingdom.
What is The Gemmological Association of Great Britain's annual budget?
Annual revenue for fiscal year 2024 is £3.3 million. 81% of expenses go to program services.
Is The Gemmological Association of Great Britain trustworthy?
The Gemmological Association of Great Britain has a GiveRadar Integrity Assessment of 76 out of 100 (Strong transparency). The score reflects public-data transparency: registration, financial disclosure, governance, contact details, and how recently data was refreshed. It does not measure program impact.
What is The Gemmological Association of Great Britain's website?
https://www.gem-a.com
Are donations to The Gemmological Association of Great Britain tax-deductible?
Donations may be tax-deductible for residents of United Kingdom under local rules. US donors should check whether the charity has an equivalency-determination letter or a US-based fiscal sponsor before claiming a deduction.