science

List of rubies by size

List of rubies by size is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand List of rubies by size rather than just read about it. In short: Rubies of various sizes have been found throughout the world. This is a list of rubies by size.

Key takeaways

List of rubies by size belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect List of rubies by size to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of List of rubies by size from memory before moving on to harder problems.

Reference excerpt

Rubies of various sizes have been found throughout the world. This is a list of rubies by size.

Gemstone A ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide). Other varieties of gem-quality corundum are called sapphires. Ruby is one of the traditional cardinal gems, together with amethyst, sapphire, emerald, and diamond. The word ruby comes from ruber, Latin for red. The color of a ruby is due to the element chromium. Some gemstones that are popularly or historically called rubies, such as the Black Prince's Ruby in the British Imperial State Crown, are actually spinels. These were once known as "Balas rubies". The quality of a ruby is determined by its color, cut, and clarity, which, along with carat weight, affect its value. The brightest and most valuable shade of red called blood-red or pigeon blood, commands a large premium over other rubies of similar quality. After color follows clarity: similar to diamonds, a clear stone will command a premium, but a ruby without any needle-like rutile inclusions may indicate that the stone has been treated. Ruby is the traditional birthstone for July and is usually pinker than garnet, although some rhodolite garnets have a similar pinkish hue to most rubies. The world's most valuable ruby is the Sunrise Ruby.

Notable rubies

See also List of individual gemstones

Bibliography Notes

References

Australian Broadcasting Corporation (May 12, 2015). "Sunrise Ruby weighing 25.29 carats sells for $30 million at Sotheby's auction in Geneva". Australian Broadcasting Corporation. Retrieved September 1, 2019. Barrish, Chris; O’Sullivan, Sean (February 21, 2014). "5 indicted in $4 million jewelry store robbery". USA Today. Retrieved September 1, 2019. Bauer, Max (1968). Precious Stones: A Popular Account of Their Characters, Occurrence, and Applications, with an Introduction to Their Determination, for Mineralogists, Lapidaries, Jewellers, Etc. With an Appendix on Pearls and Coral, Volume 1. Dover Publications. ISBN 9780486219103. - Total pages: 627 Edwards, Owen (February 1, 2005). "Romance And The Stone: A rare Burmese ruby memorializes a philanthropic woman". Smithsonian Magazine. Retrieved September 1, 2019. McAndrew, Erin (December 14, 2011). "RESULTS: The Legendary Jewels, Evening Sale & Jewelry (Sessions II and III)". Christie's. Retrieved September 1, 2019. The New York Times (2014). New York Times The Times of the Sixties: The Culture, Politics, and Personalities that Shaped the Decade. Running Press. ISBN 9781603763660. - Total pages: 324 Smithsonian Institution (2019). "Rosser Reeves Star Ruby". Smithsonian Institution. Retrieved September 1, 2019. Sherman, Lauren (October 3, 2007). "World's Ultimate Jewels". Forbes. Retrieved September 1, 2019. Linda Tauscher (July 6, 2017). "Artwork Spotlight: Mark Mothersbaugh’s “Ruby Kusturd”". Grey Art Museum. Retrieved December 11, 2025

Illustrations

Worked examples

Example 1 — a first encounter with List of rubies by size

Start with the simplest possible case. Write down what List of rubies by size claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to List of rubies by size before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about List of rubies by size ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of List of rubies by size

In research: List of rubies by size appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses List of rubies by size in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: List of rubies by size is common in secondary-school and first-year university syllabi. It links to neighbouring topics Gemstone-related lists, Lists by size, so understanding it makes those chapters shorter.
In everyday life: Look for List of rubies by size outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study List of rubies by size in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what List of rubies by size means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain List of rubies by size out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is List of rubies by size in simple terms?

Rubies of various sizes have been found throughout the world. This is a list of rubies by size.

Why does List of rubies by size matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study List of rubies by size?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on List of rubies by size.