The Spanish tiara was a papal tiara

Papal Tiara

The Papal Tiara, also known incorrectly as the Triple Tiara, or in Latin as the Triregnum, in Italian as the Triregno and as the Trirègne in French, is the three-tiered jewelled papal crown, supposedly of Byzantine and Persian origin, that is a prominent symbol of the papacy...

 given to Pope Pius IX

Pope Pius IX

Blessed Pope Pius IX , born Giovanni Maria Mastai-Ferretti, was the longest-reigning elected Pope in the history of the Catholic Church, serving from 16 June 1846 until his death, a period of nearly 32 years. During his pontificate, he convened the First Vatican Council in 1869, which decreed papal...

 by Queen Isabella II of Spain

Isabella II of Spain

Isabella II was the only female monarch of Spain in modern times. She came to the throne as an infant, but her succession was disputed by the Carlists, who refused to recognise a female sovereign, leading to the Carlist Wars. After a troubled reign, she was deposed in the Glorious Revolution of...

 in 1854.

Though of similar overall shape to the usual tiara, the Spanish tiara was different in that its decoration was primarily of jewel

Gemstone

A gemstone or gem is a piece of mineral, which, in cut and polished form, is used to make jewelry or other adornments...

s, rather than of gold inset with jewels. Its three crowns bore striking similarities in terms of design to standard tiara

Tiara

A tiara is a form of crown. There are two possible types of crown that this word can refer to.Traditionally, the word "tiara" refers to a high crown, often with the shape of a cylinder narrowed at its top, made of fabric or leather, and richly ornamented. It was used by the kings and emperors of...

s worn by women, giving the tiara a distinctly feminine look. It contained 18,000 diamond

Diamond

In mineralogy, diamond is an allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Diamond is less stable than graphite, but the conversion rate from diamond to graphite is negligible at ambient conditions...

s, pearl

Pearl

A pearl is a hard object produced within the soft tissue of a living shelled mollusk. Just like the shell of a mollusk, a pearl is made up of calcium carbonate in minute crystalline form, which has been deposited in concentric layers. The ideal pearl is perfectly round and smooth, but many other...

s, rubies

Ruby

A ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum . The red color is caused mainly by the presence of the element chromium. Its name comes from ruber, Latin for red. Other varieties of gem-quality corundum are called sapphires...

, emerald

Emerald

Emerald is a variety of the mineral beryl colored green by trace amounts of chromium and sometimes vanadium. Beryl has a hardness of 7.5–8 on the 10 point Mohs scale of mineral hardness...

s, and sapphire

Sapphire

Sapphire is a gemstone variety of the mineral corundum, an aluminium oxide , when it is a color other than red or dark pink; in which case the gem would instead be called a ruby, considered to be a different gemstone. Trace amounts of other elements such as iron, titanium, or chromium can give...

s.

Isabella's motive for giving the tiara is not publicly recorded, but it may have been an attempt at a rapprochement between the Roman Catholic Church

Roman Catholic Church

The Catholic Church, also known as the Roman Catholic Church, is the world's largest Christian church, with over a billion members. Led by the Pope, it defines its mission as spreading the gospel of Jesus Christ, administering the sacraments and exercising charity...

 and Spain

Spain

Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

, since during Isabella's reign the Spanish government had dissolved Catholic religious orders including the Jesuits and seized their property. It may also have been an attempt by Isabella to win conservative Catholic support away from the rival Carlist cause and boost support for her own reign.

If the intent was a rapprochement with the papacy then it failed. It is not known if the tiara was ever worn but it was later recorded that the tiara was sold by the Vatican and the money received given to the poor. Isabella herself was later forced to abdicate the Spanish throne.

At its creation, the Spanish tiara was valued at 500,000 franc

Franc

The franc is the name of several currency units, most notably the Swiss franc, still a major world currency today due to the prominence of Swiss financial institutions and the former currency of France, the French franc until the Euro was adopted in 1999...

s.