i used a lot surfing to get the answer ,so most aren't my info ,thanx for people who wrote up on this. i will try to add more to the list as i learn myself the different between gold.
Dendritic Gold: Gold that “grows” in delicate almost fern like branches.
DENDRRITIC
Crystalline Gold: Gold that is crystallized with thousands of minute crystals that can be seen under magnification.
CRYSTALINE
Crystallized Gold: Gold with geometric crystals visible to the naked eye. Very rare
CRYSTALLIZED GOLD
Leaf / Foil / Plate Golds: Gold that grow in thin to extremely thin sheets usually very shiny but not always. I know some will disagree with me but these golds look similar to each other except for thickness essentially.
FOLDER LEAF
Octahedral Gold: Gold growing in octahedral crystals similar to diamonds this is the most common form of gold crystallization.
Trigon Gold: Gold crystals in a pyramid or triangular 3d shape. This is the second most common gold crystallization.
Wire / Rope Gold: Gold that grow in the form of thin wires or thicker “ropes” This is an extremely rare gold formation and highly prized by collectors
WIRE WIRE NEST
Hopper Gold: The second most rare gold formation and again very highly valued by collectors, usually starting in the hundreds per gram!!! Hopper gold is gold that forms step like structures otherwise known as chevrons. Trigon crystals are the most common type of crystal that will show hoppers.
HOPPER
Flakes gold: piece of chipped gold pieces.Found after shredding.sometime can be found around fool's gold.Therefore best to stay away from this form.
GOLD FLAKES
Cubic Gold: And last but certainly not least! Cubic gold formations, the must have for any serious collector, this is the absolute rarest form of gold crystal even very small specimens are highly prized larger ones selling for obscene amounts of money in excess of $2000 per gram!!!
ALLUVIAL GOLD NUGGETS
are nuggets that are found in creeks which has been tumbled off many years ,so they are smooth appearance
A SPECIMEN GOLD NUGGET
are nugget that are matrix both gold and stone. In Australia it has been found with quartz and/or ironstone.Larges piece found ,was found in 1872 - " Holterman Nugget" weighting in as 630 pounds(250 kg) Note this is not a nugget (as nuggets are 90 to 100% pure gold, this is mostly ironstone/quartz , question is how much gold was in it.This gold piece was melded down.
DOLLYPOT GOLD
This is my friend not natural gold - what you say ? Well its crushed gold ,it contains very minor impurities - silver etc.
Believe it or not that is not the full list of types of gold crystals that mother nature creates but that will do for now. I hope this article has given you a greater appreciation for the natural beauty of gold specimens, a beauty no jeweler could ever replicate.