Alberto Fidalgo

Coloured Gemstones Auction

We couldn’t verify your address. 
Re-enter address.

We couldn’t verify your address. Review our suggested address.

We couldn’t verify your address: Re-enter address to ensure smooth delivery.

Address reformatted to ensure smooth delivery. Take a moment to review it.

Confirm your address

Generated for your convenience. Always carefully review object description, details, and images before placing a bid.

Never miss an update on the latest auctions. Don’t have an account? Create one for free.

Sign in to follow category

Don’t miss out on any of the auctions

This auction is part of %{category}

The full amount of your automatic bid has now been reached. Entering a new maximum amount will help you stay ahead of new bids from others.

Buy and sell on Europe’s most-visited online curated marketplace. Weekly auctions of 75,000 special and hard-to-find objects selected by experts.

If your bid is highest you agree to pay for this object. By bidding, you agree to our <anchor>Terms of Use<anchor/>.

All bids are binding

Join this auction live stream to follow the action in real time

Item lineup

Join this object's auction live stream to follow the action in real time

Start bidding or selling at Catawiki’s %{auction_name}. This week at auction: %{lot_name}.

You've been outbid on lot:  %{position}. %{title}

%{amount_in_bidding_currency} will be reserved on your selected credit card. This amount will be released within a week if you're not the top bidder. If you do place the top bid, the remaining amount needs to be paid within 3 days of the auction ending. If it's not paid, the auction fees will be charged to your card (up to %{limit_in_bidding_currency}).

Someone set a max bid before you. New top bid: %{amount}

Want it faster? Buy now to get it delivered sooner!

Others might want to buy this object now. Make it yours before they get to it first!

Your bid is on top and so close to the buy now price!

Try raising your bid or buy it now.

Try raising your bid or buy it now. Bids are close to the reserve price, so this could be your last chance to purchase.

Unfortunately, your bid didn’t meet the object’s reserve price.

Couldn't process your payment

Your payment is safe


All objects are quality checked


All sellers are verified

This is your last chance to make this special object yours.

Reject this offer?

Exclusive offer

Great offer

Your payment is safe


All objects are quality checked


Catawiki Buyer Protection

%{category_name} for Sale in Online Auctions

Buy and sell %{category} at Catawiki. Discover %{category} auctions filled with special objects, selected by our experts.

How to buy on Catawiki

Set a search alert to get notified when new matches are available.

Set a search alert

These cookies placed by Catawiki and partners help us gain insight into the use of our marketplace and how to keep improving it.

Analytics & research

These cookies are necessary for performance of our marketplace and are therefore set to 'always active'. This includes cookies to e.g. allow you to sign in and remember language settings. These cookies also include analytical cookies that have very little to no impact on your privacy.

Functional

These cookies placed by Catawiki and partners help us gain insight into what you like and how you behave on our marketplace. We track your behaviour so we can get an idea about your preferences, store the IDs of the auctions you click on, and show you lots that match your interests. Third parties also place marketing cookies on Catawiki, including cookies to allow social media functionality.

Marketing & social media

Cookies

Andorra

United Arab Emirates

Afghanistan

Antigua and Barbuda

Albania

Armenia

Netherlands Antilles

Angola

Argentina

American Samoa

Austria

Australia

Aruba

Azerbaijan

Bosnia and Herzegovina

Barbados

Bangladesh

Belgium

Burkina Faso

Bulgaria

Bahrain

Burundi

Benin

Bermuda

Brunei Darussalam

Bolivia

Brazil

Bahamas, The

Bhutan

Botswana

Belarus

Belize

Canada

Congo, Dem. Rep.

Central African Republic

Congo, Rep.

Switzerland

Côte d'Ivoire

Chile

Cameroon

China

Colombia

Costa Rica

Cuba

Cape Verde

Curaçao

Cyprus

Czech Republic

Germany

Djibouti

Denmark

Dominica

Dominican Republic

Algeria

Ecuador

Estonia

Egypt, Arab Rep.

Eritrea

Spain

Ethiopia

Finland

Fiji

Micronesia, Fed. Sts.

Faeroe Islands

France

Gabon

United Kingdom

Grenada

Georgia

French Guiana

Guernsey

Ghana

Gibraltar

Greenland

Gambia, The

Guinea

Guadeloupe

Equatorial Guinea

Greece

Guatemala

Guam

Guinea-Bissau

Guyana

Hong Kong

Honduras

Croatia

Haiti

Hungary

Canary Islands

Indonesia

Ireland

Israel

Isle of Man

India

Iraq

Iran, Islamic Rep.

Iceland

Italy

Jamaica

Jordan

Japan

Kenya

Kyrgyz Republic

Cambodia

Kiribati

Comoros

St. Kitts and Nevis

North Korea

South Korea

Kuwait

Cayman Islands

Kazakhstan

Lao PDR

Lebanon

St. Lucia

Liechtenstein

Sri Lanka

Liberia

Lesotho

Lithuania

Luxembourg

Latvia

Libya

Morocco

Monaco

Moldova

Montenegro

Madagascar

Marshall Islands

Macedonia, FYR

Mali

Myanmar

Mongolia

Macao, China

Northern Mariana Islands

Martinique

Mauritania

Malta

Mauritius

Maldives

Malawi

Mexico

Malaysia

Mozambique

Namibia

New Caledonia

Niger

Norfolk Island

Nigeria

Customs information

Personalised picks to help you find your next treasure. Updated daily.

After confirming, both Catawiki and the seller will be notified that the order has been delivered. You can always look at your tracking information under 'My Orders'.

Has your order been delivered?

Every day our %{count}+ in-house experts review and select only the best submitted objects to auction. Each of our experts has years of experience and knowledge in their field. 

Experts at Catawiki - Learn what our experts do and how they can help you 

Get to know %{name}, Catawiki expert in %{category}

Don’t miss out - follow to get notified when new objects are added. 

Follow %{title}

Unique Objects

Occasionally, two different bidders may show up in the bidding history with the same bid amount. This occurs when one user's bid is exactly the same as an automatic (maximum) bid placed by another user earlier. Since the auto-bid was placed first, this takes preference. The bidding history will show both bids, with the auto-bid ranked as the higher of the two.


Double bid

It may appear that the same bid has been placed by two different bidders. This can occur if someone places a bid in another currency which is then rounded to the same amount as the previous bid in %{local_currency}.

This can occur for the following reasons:
1. If an opening bid does not meet a lot’s reserve price (hidden minimum), buyers may try outbidding their earlier bid in order to find that lot’s RP.
2. If an auto-bid (user-set maximum bid) is outbid, the bidding log will show the first and final steps of that user's auto-bid in a row. The new highest bid will be shown at the top.

Why is this bidder outbidding him- or herself?

In auction

Bids exclude the auction fee and shipping costs, which will be added during final payment. Any other costs or charges such as customs or import duties, customs clearance and handling may also apply during shipment of your lot and will be charged to you at a later stage if applicable. All bids are binding.

Bids exclude the Buyer Protection fee and shipping costs, which will be added during final payment. Any other costs or charges such as customs or import duties, customs clearance and handling may also apply during shipment of your lot and will be charged to you at a later stage if applicable. All bids are binding.

Once a bid has been placed, it becomes binding. You are required to purchase any lot you win for the amount you've bid. By placing a bid, you agree to our Terms and Conditions.

Catawiki is available in GBP, USD and EUR. Prices in these currencies are converted using the currency exchange rate applicable at the start of the auction. This rate is also applied to commission rates and shipping costs.

What are the auction costs?

Are all bids binding?

Currency exchange rate

Some valuable lots come with an estimated revenue, indicated by the expert. The estimated price range mentioned serves only as an indication, and offers no guarantees as to a lot's actual value.

Shipping to your location (%{buyer_country}) from %{seller_country} usually takes %{from_days}-%{to_days} days.

Shipping to your location (%{buyer_city}, %{buyer_country}) from %{seller_country} usually takes %{from_days}-%{to_days} days.

%{price} from %{sellerCountry}, arrives in %{time} days

Shipping from %{sellerCountry} to %{buyerCountry} usually takes %{time} days.

Your payment is secure: we only release it to the seller when you’re satisfied with your object.

FREE from %{sellerCountry}, arrives in %{time} days

This object has free shipping! Shipping from %{sellerCountry} to %{buyerCountry} usually takes %{time} days

Unfortunately, this object can’t be shipped to your location. Possible reasons include that this object may have import restrictions or the seller doesn’t ship to your region.

This object can be picked up for free from %{city}, %{country}.

After you pay, you’ll receive the exact pickup address. You’ll then be able to contact the seller to arrange pickup.

Pickup from %{location} or arrange delivery      

Sign in or create an account to view shipping info based on your region. 

To continue buying and selling special objects, please confirm that you understand and agree Catawiki provides services for both buyers and sellers. %{learn_more}

Due to the size or fragility of this lot, the seller requires it to be picked up from %{city} (%{country}).

Name

Did you contact the seller?

For items without a reserve price, you can bid from €1. For items with a reserve price, bidding will start at either the reserve price, 60% of the reserve price or €1.

Give it a try and be the first to bid on this special item!

Starting bid

You'll be redirected to the PayPal site to complete your payment.


By creating an account, you can save, bid on, and buy objects you love. 

Return policy

Saved searches 

Every week, there are %{counter} new objects to explore. Save this search to receive new matches for “%{search_term}”.

Discover %{total} %{query} objects, selected by experts. Buy and sell %{query} in Catawiki’s auctions. Explore and place your bids!

View the objects offered for auction by %{seller}. Register today to join %{seller} and other sellers on Catawiki!

For non-mainland destinations including islands and overseas territories, additional charges may apply but will not exceed the Rest of the World shipping cost.

Any other costs or charges such as customs or import duties, customs clearance and handling may also apply during the shipment of your lot and will be charged to you by the involved party at a later stage if applicable.

Once you make your payment, the seller is required to ship your order within 3 working days.

View my lots at the Catawiki auctions for this week

Sold

When you search for an object, results are sorted to ensure the most value for you. When you search for an object, we default sort by ‘relevance.’ Within auctions, objects are sorted by ‘time remaining.’ 

Submissions

You’ll need to accept our new %{user_agreement} to keep buying and selling special objects.

This auction might contain images that are not suitable for viewing by persons under 18 years of age.

Opal - 4.19 ct - Antwerp Laboratory for Gemstone Testing (ALGT)

Catawiki Buyer Protection

Trustpilot 4.4 | 130932 reviews

Share this object with your friends

Opal, single stone, 4.19 ct total, origin Ethiopia, no evidence of treatment, laboratory report ALTG 5340686 (ALGT).

Description from the seller

Seller's Story

Seller's Story

Details

Similar objects