Rubies like to grow in a flat, hexagonal shape. If the uncut gem shows this natural growth characteristic, along with parts of its host rock (marble or alkali basalt) still attached, it is very likely it is a real ruby. Rubies are also very heavy for their size.
How can you tell a natural ruby?
Real rubies glow with a deep, vivid, almost “stoplight” red. Fake gems are often dull: they are “light, but not bright.” If the gem is more of a dark red, then it may be garnet instead of a ruby. If it is a real ruby, however, know that darker stones are usually worth more than lighter stones.
What do rubies look like when found?
Rubies are gem corundums with a dominant red color. The color can range from orangy red to purplish red or brownish red. The most desirable color range is a pure vibrant red to a slightly purplish red. The red color of ruby is produced by the presence of chromium in the gem.
How can you tell if a ruby is natural or synthetic?
Chemical traces are left in the stone of a lab-created ruby and this is not seen in natural rubies. Minimal internal flaws, higher quality at a lower price and a larger ruby for the same price as a smaller one will tell you that it is synthetic.
Are natural rubies rare?
Ruby is the red variety of corundum. It is quite a bit rarer than the blue gems. The rarity combined with the demand for rich red gems keeps the price very high. Among rubies though, there is no shortage of small gems, the kind used in cluster rings.
How can you tell a rough ruby?
Rubies have a hardness of 9, and the plate will only scratch stones with a hardness of 6 or less. The only way to check harder minerals is to pulverize a piece and smear the powder on the plate. A ruby’s streak would be colorless because their color is caused by trace amounts of chromium.
What rocks are rubies found in?
Rubies (as well as sapphires) can be found in various rocks, mainly those of igneous or metamorphic origin (Sethi, 1997). In addition, through the weathering of gem-bearing sedimentary rocks, these minerals are found in the form of “placer deposits” at streams and rivers.
Where are most rubies found?
Where are rubies mined? The finest rubies come from Burma (Myanmar). They are also mined in Afghanistan, Australia, Cambodia, India, Madagascar, Malawi, Mozambique, Pakistan, Sri Lanka, Tanzania, Thailand, the United States, and Vietnam.
How can you tell a ruby from a garnet?
Rubies have a deeper and more distinct red color, while garnets, in comparison, appear lighter and paler. In addition, a ruby could perhaps even seem slightly purple, some would even say bluish. But if the hue of the stone leans towards shades such as orange or yellow, you’re probably looking at a garnet.
What gemstones are red in color?
Best Red Gemstones Used in Jewellery
- Ruby. Whenever we hear the term red gemstone, perhaps ruby is the only gem that comes to our mind usually. …
- Red Garnet. Garnet gemstones come in all colours except blue. …
- Red Diamond. …
- Red Tourmaline / Rubellite. …
- Red Zircon. …
- Red Agate. …
- Red Spinel. …
- Red Topaz.
How can I tell if a ruby is glass filled?
How can I tell if a ruby is glass filled? The most notorious visual characteristic of a composite ruby is the internal gas bubbles. These can be single spheres or clouds of bubbles, flattened or rounded, and they are present in virtually all fissure filled rubies.
Do fake rubies glow under a blacklight?
Can you settle this? Answer: All rubies fluoresce, whether they’re mined or created in a lab, since natural and synthetic ruby gemstones have the same chemical composition and physical properties.
What is an African ruby?
African rubies are usually purplish to dark red in color and come in a variety of sizes and quality ranging from opaque to translucent to transparent. Usually African rubies are very much included and are cut en cabochon. Transparent rubies are usually cut and polished into faceted stones.
What color ruby is most valuable?
The Color of Ruby
The finest ruby has a pure, vibrant red to slightly purplish red color. In most markets, pure red colors command the highest prices and ruby with overtones of orange and purple are less valued. The color must be neither too dark nor too light to be considered finest quality.
Is it a ruby or garnet?
Rubies are harder, a much more brilliant red, and much more expensive. Examine the color closely. If the stone has hints of orange or other earthy tones — other than red — it’s likely a garnet. Rubies are considered best with a vivid redness, but sometimes they have purplish or bluish secondary hues.