Brazilian Agate Large Slabs
There are at least 15 major agate-producing areas in Brazil. 12 of these are located in the 5 most southeastern states of the country, Rio Grande do Sul, immediately north of Uruguay, being the best known. Other areas include Santa Catarina, Paraná, Sao Paolo, and Minas Gerais. Two other areas are in the state of Bahia in east central Brazil and another located in the state of Roraima in the extreme northwest. Polyhedroid Agates come exclusively from Paraiba. Agates were discovered in the late 1920's by a geologist named B.V. Freyburg with the Geological Survey of Argentina. Current laws in Brazil prohibit the export of unfinished agate
The agates from Brazil are mostly mined from decomposed volcanic ash and basalt from the late Permian age (248-275 million years ago) In Rio Grande do Sul the "agate mines" are normally just plowed fields in which loose agates are found and collected. Brazilian agates are very colorful stones with some of the most beautiful inclusion and structures imaginable. Agate is very hard and takes an excellent polish. Sadly, most of the market for Brazilian agates is for the "dyed" versions of these stones. When you see a pink, teal, purple or green agate it is dyed not natural. We have a few dyed bookend sets, but prefer to deal only in natural agates. We purchase some cut agates from Brazil, ones with the bottoms cut flat for display or cathedrals(man made cement type coatings).
Our preference is to locate the agates whole and cut and polish them in our shop. We generally do 1/2 nodules or 1/3 cuts with polished faces. We like to find those inner treasures.
We sell most agates this way, but do from time to time cut some slabs for sale. You can make many slabs out of one nodule. Our slabs for sale will normally be cut and not polished. The 3.4 lb perfect agate listed first has the most brilliant shine...like glass.
Item # LBS0209001
Top Quality Extra Large Polished on Both Sides! 13" x 9-3/8" x 3/8" Stunning natural Brazilian Agate slab!
Quantity Available 1 each
Rarely does one find a Brazilian agate without natural fractures or cracks. This one is XL and as perfect as nature allows. There are no visible fractures on this one! This agate has a blindingly high gloss polished finish as well. This XL Agate slab is from Brazil. It comes with a large plastic stand. The first pictures show the Agate viewed next to a window. Other pics are how it would look not backed by light. Polished on both sides. The slab measures 13" by 9 3/8" by 3/8" thick. It weighs 3 pounds 6 oz. Excellent condition! Beautiful display Agate.
Item # LBS0209002
Top Quality Extra Large Polished Face 8" x 8" across 1-3/8 to 1-1/2" thick Stunning Brazilian Agate end cut slab!
Quantity Available 1 each
Excellent large natural Brazilian agate end cut with bottom cut flat for display. This excellent specimen has a colorful display with excellent fortification lines and exceptional growth patterns. There is an area of white to clear quartz with almost a vug formation. It is EXTREMELY HARD to find specimens this size without massive natural cracks or other imperfections. We were extremely lucky finding these specimens! This piece measures approximately 8 x 8 x 1-1/2 " and weighs 7.6 lbs! The face is highly polished!