1. What Is Left If You Keep Dividing Gold Into Smaller Pieces?
Imagine cutting a gold ring in half, then in half again, and continuing to divide it smaller and smaller. It remains gold only until you reach a single atom. At the center of a gold atom, there are 79 protons. The number of protons determines the type of element, so this "79" is the marker for gold. If there is one more or one less proton, it becomes a different element. All naturally occurring gold atoms are of one type called "gold-197," where 197 is the total number of protons and neutrons [1].
This means gold is not a material made by mixing other things; it is the element itself. To answer the title's question simply: gold is not made from something else; it is the element gold. But can humans make gold from other elements?
2. Can Chemical Reactions or Experiments Change Atoms Into Gold?
Chemical reactions like mixing, dissolving, or burning mainly involve the electrons around an atom. The number of protons in the center does not change, so chemical reactions cannot turn other elements into gold. However, nuclear reactions, which change the atomic nucleus itself, are different. In 1941, Sherr and others at Harvard University reported an experiment where they hit mercury with fast neutrons to change its nucleus [2].
This showed that changing a nucleus can change an element. But this method does not produce enough gold to make a ring. So, what events in the universe change atomic nuclei to create gold?
3. Could Colliding Neutron Stars Make Gold and Other Heavy Elements?
Heavy elements like gold and platinum are said to be made by the "r-process," where neutrons stick to atomic nuclei one after another in a short time [3]. Because this requires many neutrons, it can only happen in specific places. In the past, supernova explosions were the leading candidate. But as research progressed, scientists found that supernovae might not have enough neutrons to support the r-process, even with material from neutron stars [3].
So, the merger of two neutron stars became a strong candidate for study. Neutron stars are small, extremely heavy stars packed with neutrons. Scientists began to think that if two of them merge, there might be enough neutrons. An opportunity to test this idea in the real sky arrived in 2017.
4. What Did Telescopes Observe After the 2017 Gravity Wave Detection?
On August 17, 2017, LIGO in the US and Virgo in Europe detected gravity waves called GW170817, which were thought to be caused by the merger of two neutron stars [4]. The Japanese J-GEM team began observing the same direction with the Subaru Telescope in Hawaii about 17 hours after the alert.
On October 16, 2017, the team announced they had likely directly observed a likely site where heavy elements like gold and platinum form. The National Astronomical Observatory of Japan stated that they may have seen the birthplace of gold [4]. After the merger, the sky brightens in an event called a "kilonova." This light is thought to come from the radioactive decay of heavy elements created in the merger. Kasen and others reported in 2017 that the light from GW170817 matched theories that neutron star mergers make heavy elements [5]. The conclusion was that mergers may be a major site for making r-process elements. However, there is still a gap between "matching the theory" and "seeing gold itself."
5. Why Can't Scientists Say They Have Definitely Seen Gold in the Collision?
Matching a theory is different from seeing gold itself. In a study published by ESO (European Southern Observatory) in 2019, Watson and others identified strontium from the spectrum of the same kilonova [6]. Strontium is heavier than iron, and its discovery was evidence that neutron star collisions make heavy elements. But what was found was strontium, not gold. Direct detection of gold has not been reported in the literature so far.
There is also a trap in talking about amounts. J-GEM simulations suggest that a very large amount of r-process elements was made in this merger [4]. This is the total amount including gold, platinum, and rare earths. It does not mean "so much gold alone was made." Reading it that way is an error.
Also, mergers are not the only possible source. In 2025, Patel and others published a paper interpreting unexplained gamma rays observed after a giant flare from the magnetar SGR 1806-20 in December 2004. They suggested this could be the radioactive decay of newly made heavy elements [7]. The authors estimate this kind of phenomenon might account for about 1 to 10% of the galaxy's r-process elements. However, there is only one properly recorded example, and the authors themselves say it is too early to draw conclusions.
6. How Did Gold Get From Earth's Core Up to the Surface?
When Earth solidified, heavy elements like gold should have sunk with heavy iron into Earth's core, leaving almost none near the surface [8]. Yet, precious metals like gold are found in the crust and mantle. A leading theory is that meteorites that fell after Earth formed brought them [8]. Willbold and others showed results matching this theory in a 2011 Nature paper. They studied tungsten isotopes in rocks from Greenland that are about 3.8 billion years old [9]. However, this is a leading theory, not a final answer. Other theories exist.
The concentration of gold in the crust is listed as 1.3 parts per billion and 4 parts per billion in Royal Society of Chemistry materials [1]. This is a concentration of about 1 to 4 milligrams of gold per ton of rock. Current leading ideas suggest gold formed in cosmic events and may have reached Earth in meteorites. This tiny amount of gold is now in our hands.
7. Which Elements Sit Next to Gold on the Periodic Table?
Look for atomic number 79, gold, on a periodic table in a science book or encyclopedia. Number 78 next to it is platinum, and number 80 is mercury. Mercury is the element used in the 1941 neutron experiment. Platinum is often listed as a representative element made by the r-process, alongside gold. You can see how the names and events in this article connect to their positions on the table.
Gold itself has not yet been directly found in space. Where gold was born is a story that will be updated little by little with future observations. How many more neutron star mergers must be found before we can say they are the main birthplace of gold? You can look for updates in announcements from the National Astronomical Observatory and other groups.