Bile, or gall, is composed of water, bile acids and their salts, bile pigments, cholesterol, fatty acids, and inorganic salts. Bile acids are synthesized in the liver from cholesterol.
Pigments are organic coloring molecules within the body. They may be found in the bile, blood, urine, choroid (eye), or skin and hair. Blood, bile and urinary pigments are derived from hemoglobin or the products of hemoglobin catabolism.
Common Bile Pigments:
Bilirubin (linear tetrapyrrole)
color: yellow or red.
Biliverdin (linear tetrapyrrole)
color: green or blue
Source: oxidation of bilirubin
Bilirubin is modified in the liver to increase its solubility in aqueous media and the product is secreted into the bile. Microbial conversion of the bile pigments in the large intestine finally yields products that are responsible for the yellow color of urine (after reabsorption of the pigment from the large intestine) and the color of the feces.
Those pigments are responsible for progressive changes in color of a hematoma, or bruise in which the damaged tissue changes its color from an initial dark blue to a red-yellow and finally to a yellow color before all the pigment is transported out of the affected tissue.
Most likely, green (shiny, almost transparent) stones are comeing out from your liver. They can be also blue-green.
That is just pure cholesterol and Biliverdin.
Bile is alkaline fluid of a green-blue, yellow or brown color.
Bile produced by liver is often green (biliverdin).
Bile possibly becomes more yellow/red/brown inside gallbladder (bilirubin).
Bile pigment (bilirubin) is the products of the breakdown of hemoglobin removed by the liver from old red blood cells. The yellow and brownish/red color of the bile pigments imparts the characteristic yellow/brown color of the feces. Color is due to bacterial action on bile pigments.
In normal individuals, intestinal bilirubin is acted on by bacteria to produce the final porphyrin products, urobilinogens and urobilins, that are found in the feces. Bilirubin and its catabolic products are collectively known as the bile pigments.
Feces are normally brown or dark brown in color, soft, and formed. Bile pigments give feces their characteristic color. The typical odor is caused by nitrogen compounds that are produced by the action of bacteria.
Yellow and red color comes from bilirubin.
Most likely, yellow stones are comeing out from your gallbladder.
They are often yellow outside, but green inside. (possibly indicating that stones started forming inside liver)
Yellow color may (I say may) be also produced through digestion.
Possibly as a chemical reaction between stone, bile, digestive juices and bacteria.
Black & brown color comes from Black and brown bile pigments.
There are few web sites and photos of liver (photos taken after obduction). On those photos, liver contains green stones.
Yellow is the most common color of stones inside gallbladder.
> I am of good to average health , some acne, allergies.
Have you seen any change on your skin (acne), or in regards to your allergies?