Yes of course they can. Simulated Diamonds are made to Fool the naked Eye. A good Jeweler may spot one, But the average person on the street can not tell right off the bat. Especialy when it is set in Gold Already and polished up.
You probably don't -- can't discern the authenticity of a diamond with the naked eye.
That depends, some gems are being made now to look almost completely like the real thing. However these are marked specifically because they are so hard to tell from natural diamonds. However, cheap diamonds that are crystal or glass will be obvious form the naked eye due to the clarity, and color.
The term "naked eye" means that there is nothing helping the eye to see. for example, if you are using glassess or a telescpoe, then you are not using the naked eye.
No, gas is typically invisible to the naked eye.
When you look at your blood with the naked eye all you see is red liquid. This is all anyone sees with the naked eye.
"S1" on gold jewelry typically refers to the quality of the diamonds used in the piece. It stands for "Slightly Included" and indicates that there are some small inclusions present in the diamonds, which may be visible under magnification but not necessarily to the naked eye.
The term "Naked eye" refers to your vision or able to be seen without the aide of a microscope or telescope.
Mercury, Venus, Mars, Jupiter, and Saturn can be seen with the naked eye.
Mercury, Venus, Mars, Jupiter, and Saturn can be seen with the naked eye.
Around 2500-5000 visible stars with the naked eye.
The Naked Eye - 1995 is rated/received certificates of: USA:R
No, the human egg is not visible to the naked eye as it is microscopic in size.