Historical eventJanuary 261905

Carat (mass)

The 3,106-carat (621 g) Cullinan Diamond (pictured), the largest gem-quality rough diamond ever found, was discovered at the Premier Mine in Gauteng, South Africa.

Everything on January 26Original source

In context

When
Thursday, January 26 1905121 years ago
Category
Historical eventA dated happening — a battle, treaty, launch, discovery, disaster or decision — recorded on this calendar day.
Era
20th century · 1900s
Recorded from
Wikipedia “On this day” feed

Russia, Greece and some other countries used the Julian calendar into the early 20th century, so local records may show a date up to 13 days earlier.

At a glance

Dates: From 1905.

What happened

The 3,106-carat (621 g) Cullinan Diamond (pictured), the largest gem-quality rough diamond ever found, was discovered at the Premier Mine in Gauteng, South Africa.

January 26 through the years

Other entries on the same calendar day, in order.

  1. 1905Carat (mass)
  2. 1998Clinton–Lewinsky scandal
  3. 2001Seismic magnitude scales
  4. 2001Death of Diane Whipple
  5. 20012001 Gujarat earthquake
  6. 2009Antananarivo
  7. 2009Nadya Suleman
  8. 20152015 Los Llanos Air Base crash
  9. 2015Syrian civil war
  10. 2020Sikorsky S-76
  11. 20212021 Indian farmers' Republic Day protest

Also in 1905

  • September 5Theodore RooseveltUnder the mediation of U.S. president Theodore Roosevelt, the Russo-Japanese War officially ended with the signing of a treaty at the Por…
  • May 22Abdul Hamid IISultan Abdul Hamid II established the Ullah millet, a separate millet for the Aromanians within the Ottoman Empire.
  • January 16Ice hockeyDespite being blind in one eye, ice hockey player Frank McGee (pictured) set the record for most goals in a Stanley Cup game when he scor…
  • October 16British RajAuthorities of the British Raj partitioned the Bengal Presidency, separating the largely Muslim eastern areas from the largely Hindu west…
  • October 26Saint Petersburg SovietThe Saint Petersburg Soviet held its first meeting, becoming the first elected body in Russia to represent workers.
  • December 4Great Seimas of VilniusThe Great Seimas of Vilnius met to discuss national concerns within Lithuania: they decided to demand wide political autonomy within the…
  • August 19Albert Grey, 4th Earl GreyIn a ceremony officiated by Albert Grey, 4th Earl Grey, The Luck of Cumberland (pictured) was presented to HMS Cumberland.
  • June 27Russian Revolution of 1905First Russian Revolution: The crew of the Russian battleship Potemkin began a mutiny against their officers.

Everything we record for 1905 →

Sources

Cite this page

“Carat (mass)”, What's On This Date, https://whatsonthisdate.com/app/event/carat-mass-1905-january-26, accessed October 28, 2026.

Cite the underlying source as well — the source links above go to the record this entry is adapted from.

Questions about this entry

When did Carat (mass) happen?

January 26 1905 — 121 years ago, on a Thursday.

Where does this text come from?

Wikipedia “On this day” feed. Summaries are short adaptations that link back to the source, not reprints.

How do I cite this page?

Use the ready-made citation near the sources at the bottom of the page, and follow the source link to cite the underlying record as well.

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