While it's a good tale for selling putative Lemurian crystals ( first discovered in Brazil in 1999 and now mined as 'Lemurian' crystals all over the world), what is the scientific evidence for thinking that a spiritually advanced, sophisticated matriarchal human culture once existed on a lost continent of Lemuria once existing in the Indian Ocean?
First, the name Lemuria was coined by English geologist Philip Sclater as part of a now discredited 19th century scientific theory that originally hypothesized that a (now sunken) continent bridged Madagascar, India and Australia in the Indian Ocean. The modern science of plate tectonics disproves that a continental land bridge ever existed under the Indian Ocean. Sunken continents such as Mauritia and the Keugeulen Plateau do exist in the Indian Ocean, but according to geologists, there exists "no known geological formation under the Indian or the Pacific Oceans that could serve as a land bridge between continents."
According to the modern science of plate tectonics, the last time Madagascar, India and Australia were joined together within one continental landmass was when the supercontinent Gondwana was present upon the earth. Gondwana was formed in the early middle Jurassic (about 180 million years ago) when the supercontinent Pangea broke up. Gondwana itself began to break up in the middle Jurassic about 170 million years ago. The Jurassic period was the Age of the Dinosaurs, not the Age of Homo sapiens (nor the Age of the genus Homo, for that matter).
A new model for "early primate" origins does extend back into the Jurassic:
"A new model for primate origins is presented in Zoologica Scripta, published by the Norwegian Academy of Science and Letters and The Royal Swedish Academy of Sciences. The paper argues that the distributions of the major primate groups are correlated with Mesozoic tectonic features and that their respective ranges are congruent with each evolving locally from a widespread ancestor on the supercontinent of Pangea about 185 million years ago."
Given this latest scientific information, the ultimate Motherland of all primate lineages is the supercontinent Pangea. No Indian Ocean existed at the time of Pangea as it existed 237 million years ago. At this time, Madagascar, Australia and Antarctica and India were landlocked by the Gondwana section of Pangea, with northern India lying submerged under the Tethys Ocean (as was the ancient continent of Cimmeria, containing what is today Tibet, Iran, Turkey, Afghanistan, Shan-Thai and Malaya, all submerged under the Paleo-Tethys Ocean).
During the Jurassic 195 million years ago, India, Madagascar, Africa, Antarctica and Australia were still joined together as part of Gondwana with no lost continent separating them from one another. There was still no Indian Ocean.
The only large continent that has ever been in the Indian Ocean is India. The microcontinent of Mauritia existed in the Indian Ocean as part of India and Madagascar. Mauritia is thought to have sank around 84-60 million years ago when Madagascar and India separated (which occurred before India collided with Asia around 40-50 million years ago). Mauritia never existed as a land bridge joining India and Madagascar with Australia in the Indian Ocean. That part of South India (namely, Mauritia) was lost to the sea is supported by ancient Indian literature, but ancient Indian literature does not support that there was a separate continent lost to the Indian ocean.
We also know that prosimian primates diverged genetically from anthropoid primates (which is the human primate lineage) around 55 million years ago. The genus Homo is estimated to be between 1.5 and 2.5 million years old. While I personally believe that the Homo lineage is a bit older, perhaps even as much as several million years older, I also think that it is unlikely that the genus Homo arose as early as 84-40 million years ago, making it again unlikely that a spiritually advanced, sophisticated matriarchal human civilization existed on Mauritia (or a mythic Lemuria in the Indian Ocean).
I do, however, believe that spiritually advanced, sophisticated human civilizations with some sort of intelligent governance existed before 12,000 years ago (and up to hundreds of thousands of years ago), which have been lost due to global cataclysm. There does exist a substantial body of anomalous scientific evidence for that belief. The rise of civilization after the cataclysm, within the past 10,000 years, is effectively a recovery of knowledge and technology. I believe that we are indeed a species with amnesia regarding our ancient prehistoric past.
Taking all of this together, as many New Agers and occultists claim, there is no scientific evidence for a lost Lemurian continental land bridge under the Indian Ocean, inhabited by a spiritually advanced, sophisticated matriarchal human civilization. As I have claimed, there IS evidence for a small lost continent known as Mauritia under the Indian Ocean which was inhabited by anthropoid primates (an ancient lineage shared by all of the Great Apes following the genetic divergence of prosimian and anthropoid primate lineages) and most likely, by other diverging and further evolving lineages of the anthropoid primate group possibly even up through archaic pre-human lineages.
As I have claimed, there IS also now published scientific support for the evolution of anthropoid primates on Antarctica and India during the Jurassic, the Age of the Dinosaurs. As I have claimed, there IS also scientific evidence for the origin of life on parts of Antarctica. As I have claimed, there IS emerging new scientific evidence (genetic, geologic and archeologic) for the origin of Homo sapiens as a species in India.
As I have claimed, there IS scientific evidence (see Cataclysm: Compelling Evidence of a Cosmic Catastrophe in 9500 BC by D.S. Allan and G.B. Delair, a multidisciplinary scientific study of the evidence) for a global catalclysm caused by the star fragment Phaeton (also known as Marduk, Tistrya and Tistar in Near Eastern ancient mythologies) ejected from the Vela Supernova which submerged Atlantis and other low-lying and coastal regions of the world. Ancient mythologies and accounts have described the shapeshifting approach of the star fragment between the earth and the moon (disrupting the lithosphere) as a serpent, a wolf, a horned bull, a horse, a dragon, a lion's head, a boar, a giant bird, a behemoth, and a leviathan. Ovid's account of the celestial event describes the course of the star fragment as contrary to the earth's rotation. Ancient Persian descriptions particularly take note that Tistrya (Phaeton) changed shape repeatedly as it approached the earth. The legends of the Druids, Finns, Scandinavians, Hebrews, Muslims, Native American Kolushes, Southern Utes, Hopi, Eskimos, Aztecs, Maya, Australian Aborigines, Egyptians, Hottentots, Sudanese, Brazilian Aberdervs and so many, many more peoples all over the world have legends related to this cataclysmic time in earth prehistory.
In summary, here you have some of the evidence against the New Age notion of the existence of a spiritually advanced, sophisticated matriarchal civilization on a lost continental land bridge named Lemuria in the Indian Ocean. Verdict - scientifically unlikely.
Here you also have additional evidence from some of the Traditions of the World of the global cataclysm which destroyed the real existence of spiritually advanced, sophisticated human civilizations throughout the world around 12,000 years ago. Verdict - very likely.